The following diagram represents a structure of chromosome. Identify the structures of marked as 1, 2 and 3.

1 - Satellite, 2 - Centromere, 3 ? Telocentric

1 ? Satellite, 2 - Primary constriction, 3 ? Acrocentric

1 - Satellite, 2 - Secondary constriction, 3 ? Metacentric

1 - Satellite, 2 - Centromere, 3 ? Telocentric

1 -Satellite, 2-Centromere, 3-Submetacentric

In prokaryotes, chromatophores are:

specialised granules responsible for colouration of cells.

structures responsible for organising the shape of the organism.

inclusion bodies lying free inside the cells for carrying out various metabolic activities.

internal membrane system which becomes extensive and complex in photosynthetic bacteria.

Which one of the following pairs is not incorrectly matched?

Grana - Membrane bound discs in chloroplasts that contain chlorophylls and carotenoids.

Cristae - The tubular structure formed by the folding of the inner membrane of the mitochondrion.

Plasmodesmata - The membrane surrounding the vacuole in plants.

Grana - Membrane bound discs in chloroplasts that contain chlorophylls and carotenoids.

Middle lamella - Layer between adjacent cells walls in plants derived from cell plate.

Identify the components labelled as 1, 2, 3, 4 and 5 in the diagram given below from the list to (viii). (i) Cristae of mitochondria (ii) Inner membrane of mitochondria (iii) Cytoplasm (iv) Smooth endoplasmic reticulum (v) Rough endoplasmic reticulum (vi) Mitochondrial matrix (vii) Ribosome (viii) Nucleus

1 - (i) 2 - (iv) 3 - (vii) 4 - (vi) 5 - (iii)

1 - (viii) 2 - (v) 3 - (vii) 4 - (iii) 5 - (iv)

1 - (i) 2 - (iv) 3 - (vii) 4 - (vi) 5 - (iii)

1 - (vi) 2 - (v) 3 - (iv) 4 - (vii) 5 - (i)

1 - (v) 2 - (i) 3 - (iii) 4 - (ii) 5 - (iv)

Cyclosis is [KCET 1994; RPMT 1997]

Up and down movement of protoplasm

Circular movement of cytoplasm inside the cell

Up and down movement of protoplasm

To and fro movement of nucleoplasm

Plant cell is differ from animal cell because of [MP PMT 2003]

The absence of cell wall and presence of chloroplast in animal cell

The presence of cell wall and absence of chlorophyll in plant cell

The presence of cell wall and chlorophyll in plant cell

The absence of cell wall and presence of chloroplast in animal cell

The absence of cell wall and presence of chlorophyll in plant cell

When green tomatoes fruits turn to red, then [AFMC 1987, 2003]

Chloroplasts are disintegrated and get converted into chromoplasts

Chromoplasts are changed to chloroplasts

Size of molecules that can pass through plasma membrane is [AMU 1991]

\[\text{8-10 }\overset{\text{o}}{\mathop{\text{A}}}\,\]

\[\text{1-15 }\overset{\text{o}}{\mathop{\text{A}}}\,\]

\[\text{8-10 }\overset{\text{o}}{\mathop{\text{A}}}\,\]

\[\text{10-13}\overset{\text{o}}{\mathop{\text{A}}}\,\]

\[\text{15-75}\overset{\text{o}}{\mathop{\text{A}}}\,\]

Which of the following does not require carrier molecules during transport through cell membranes [BHU 1994]

Active transport of sugars and amino acids

The nucleus has [CBSE PMT 1993]

Two membranes with pores through which substances do not pass

Two membranes with pores through which macromolecules may pass

In an old science fiction movie, the hero tried to drown a giant ant by holding its head under water. Would this work? Why?

Yes, Ants use lungs to breathe much as we do.

Yes, The skin surface, covered with water, could not get \[{{O}_{2}}\] from the air.

No, Ants use gills for respiration, like crabs do.

No, Ants breathe through holes in the sides of their bodies.

Presence of large number of alveoli around alveolar ducts opening into bronchioles in mammalian lungs is:

Inefficient system of ventilation with little of residual air.

Inefficient system of ventilation with high percentage of residual air.

An efficient system of ventilation with no residual air.

An efficient system of ventilation with little residual air.

Smoking destroys the cilia in the respiratory passage ways. This:

Makes it harder to move air in and out of the lungs.

Decreases the surface area for respiration.

Slows blood flow through lung blood vessels.

Makes it harder to keep the lungs clean.

The chloride shift in red blood cells is the movement of:

Chloride ions into the cell to balance its uptake of hydrogen carbonate ions.

Cations into the cell to balance its uptake of chloride ions.

Chloride ions from the blood into the glomerular filtrate for excretion.

Chloride ions out of the cell to balance the release of hydrogen carbonate ions.

Chloride ions into the cell to balance its uptake of hydrogen carbonate ions.

Heart beats are accelerated by:

Cranial nerves and acetylcholine

Sympathetic nerves and acetylcholine

Sympathetic nerves and epinephrine

QRST is related with:

Ventricular contraction or depolarization

14620 + Mcqs in Biology in NEET Page 288 McqOptions

14351.	The following diagram represents a structure of chromosome. Identify the structures of marked as 1, 2 and 3.
A.	1 ? Satellite, 2 - Primary constriction, 3 ? Acrocentric
B.	1 - Satellite, 2 - Secondary constriction, 3 ? Metacentric
C.	1 - Satellite, 2 - Centromere, 3 ? Telocentric
D.	1 -Satellite, 2-Centromere, 3-Submetacentric
Answer» C. 1 - Satellite, 2 - Centromere, 3 ? Telocentric

Discussion

14352.	In prokaryotes, chromatophores are:
A.	specialised granules responsible for colouration of cells.
B.	structures responsible for organising the shape of the organism.
C.	inclusion bodies lying free inside the cells for carrying out various metabolic activities.
D.	internal membrane system which becomes extensive and complex in photosynthetic bacteria.
Answer» E.

Discussion

14353.	Which one of the following pairs is not incorrectly matched?
A.	Cristae - The tubular structure formed by the folding of the inner membrane of the mitochondrion.
B.	Plasmodesmata - The membrane surrounding the vacuole in plants.
C.	Grana - Membrane bound discs in chloroplasts that contain chlorophylls and carotenoids.
D.	Middle lamella - Layer between adjacent cells walls in plants derived from cell plate.
Answer» C. Grana - Membrane bound discs in chloroplasts that contain chlorophylls and carotenoids.

Discussion

14354.	The ribosomes are made up of:
A.	DNA + Protein
B.	RNA+Protein
C.	DNA+RNA
D.	None of these
Answer» C. DNA+RNA

Discussion

14355.	Identify the components labelled as 1, 2, 3, 4 and 5 in the diagram given below from the list to (viii). (i) Cristae of mitochondria (ii) Inner membrane of mitochondria (iii) Cytoplasm (iv) Smooth endoplasmic reticulum (v) Rough endoplasmic reticulum (vi) Mitochondrial matrix (vii) Ribosome (viii) Nucleus
A.	1 - (viii) 2 - (v) 3 - (vii) 4 - (iii) 5 - (iv)
B.	1 - (i) 2 - (iv) 3 - (vii) 4 - (vi) 5 - (iii)
C.	1 - (vi) 2 - (v) 3 - (iv) 4 - (vii) 5 - (i)
D.	1 - (v) 2 - (i) 3 - (iii) 4 - (ii) 5 - (iv)
Answer» B. 1 - (i) 2 - (iv) 3 - (vii) 4 - (vi) 5 - (iii)

Discussion

14356.	Cyclosis is [KCET 1994; RPMT 1997]
A.	Circular movement of cytoplasm inside the cell
B.	Up and down movement of protoplasm
C.	To and fro movement of nucleoplasm
D.	None of the above
Answer» B. Up and down movement of protoplasm

Discussion

14357.	Protoplasm found inside the nucleus is known as [CPMT 1979]
A.	Nucleoplasm
B.	Amyloplast
C.	Elaioplast
D.	Cytoplasm
Answer» B. Amyloplast

Discussion

14358.	Red colour of tomato is due to [Orissa JEE 2004]
A.	\[\beta -\]carotene
B.	Anthocyanin
C.	Lycopene
D.	Erythrocyanin
Answer» D. Erythrocyanin

Discussion

14359.	Plant cell is differ from animal cell because of [MP PMT 2003]
A.	The presence of cell wall and absence of chlorophyll in plant cell
B.	The presence of cell wall and chlorophyll in plant cell
C.	The absence of cell wall and presence of chloroplast in animal cell
D.	The absence of cell wall and presence of chlorophyll in plant cell
Answer» C. The absence of cell wall and presence of chloroplast in animal cell

Discussion

14360.	A typical parenchyma cell does not contain [CPMT 1987]
A.	Nucleus
B.	Chloroplast
C.	Central vacuole
D.	Cell wall
Answer» C. Central vacuole

Discussion

14361.	When green tomatoes fruits turn to red, then [AFMC 1987, 2003]
A.	Chloroplasts are disintegrated and get converted into chromoplasts
B.	New chromoplasts are formed
C.	Chromoplasts are changed to chloroplasts
D.	None of the above
Answer» B. New chromoplasts are formed

Discussion

14362.	Cytochrome is found in [CPMT 1980]
A.	Cytoplasm
B.	Golgi body
C.	Nucleus
D.	Plasmalemma
Answer» B. Golgi body

Discussion

14363.	The term chromatophore was coined by [AIIMS 1998]
A.	Schmitz
B.	Comparethi
C.	W. Pfeffer
D.	Singer and Nicolsan
Answer» B. Comparethi

Discussion

14364.	Which of the following layer is present nearest to plasma membrane in plant cell [AFMC 2002]
A.	Secondary wall
B.	Middle lamella
C.	Primary wall
D.	Tonoplast
Answer» B. Middle lamella

Discussion

14365.	Lomasomes are found in [BVP 2000]
A.	Algal cell
B.	Fungal cell
C.	Yeast
D.	E. coli
Answer» C. Yeast

Discussion

14366.	Which one of the following activator remains attached with ATP in plasma membrane
A.	\[\text{M}{{\text{g}}^{++}}\]
B.	\[C{{a}^{++}}\]
C.	\[{{K}^{+}}\]
D.	\[N{{a}^{+}}\]
Answer» B. \[C{{a}^{++}}\]

Discussion

14367.	Which is the latest model that is proposed to explain the structure of plasma membrane [DPMT 1981; BHU 2001; CBSE PMT 2002; BVP 2003]
A.	Fluid mosaic model
B.	Molecular model
C.	Unit membrane model
D.	None of the above
Answer» B. Molecular model

Discussion

14368.	Size of molecules that can pass through plasma membrane is [AMU 1991]
A.	\[\text{1-15 }\overset{\text{o}}{\mathop{\text{A}}}\,\]
B.	\[\text{8-10 }\overset{\text{o}}{\mathop{\text{A}}}\,\]
C.	\[\text{10-13}\overset{\text{o}}{\mathop{\text{A}}}\,\]
D.	\[\text{15-75}\overset{\text{o}}{\mathop{\text{A}}}\,\]
Answer» B. \[\text{8-10 }\overset{\text{o}}{\mathop{\text{A}}}\,\]

Discussion

14369.	When a cell engulfs or surrounds a particle and forms a vesicle around it, the phenomenon is known as [AMU 1990]
A.	Exocytosis
B.	Phagocytosis
C.	Endocytosis
D.	None of these
Answer» C. Endocytosis

Discussion

14370.	Which of the following does not require carrier molecules during transport through cell membranes [BHU 1994]
A.	Simple diffusion
B.	Facilitated diffusion
C.	Na+ -K+ transport
D.	Active transport of sugars and amino acids
Answer» B. Facilitated diffusion

Discussion

14371.	DNA genetic material occurs by itself in lower organisms and combined with proteins as nucleoproteins in higher organisms. The nucleoprotein is organized in higher forms to form
A.	Chromosome
B.	Nucleolus
C.	Nucleotides
D.	Nucleoside
Answer» B. Nucleolus

Discussion

14372.	The nucleoplasm is continuous with the cytoplasm of a cell through [MP PMT 1994]
A.	Centriole
B.	Endoplasmic reticulum
C.	Nuclear pores
D.	Golgi apparatus
Answer» D. Golgi apparatus

Discussion

14373.	Centromere is part of [CBSE PMT 1997; BHU 2002; MP PMT 2003]
A.	Ribosomes
B.	Mitochondria
C.	Chromosome
D.	Endoplasmic reticulum
Answer» D. Endoplasmic reticulum

Discussion

14374.	Which of the following are used to define the karyotype of a species 1. The number of chromosomes 2. The chromosome length 3. The positions of the centromeres Code : [MP PMT 1993]
A.	1, 2 and 3 are correct
B.	Only 1 and 2 are correct
C.	Only 2 and 3 are correct
D.	Only 1 and 3 are correct
Answer» B. Only 1 and 2 are correct

Discussion

14375.	A chromosome in which the centromere is situated near one end is known as [MP PMT 1998, 2002; AIIMS 2002]
A.	Telocentric
B.	Acrocentric
C.	Submetacentric
D.	Metacentric
Answer» C. Submetacentric

Discussion

14376.	DNA is mainly found in [CBSE PMT 1999]
A.	Nucleus only
B.	Nucleus and cytoplasm
C.	Cytoplasm only
D.	All of these
Answer» B. Nucleus and cytoplasm

Discussion

14377.	Who showed that the nuclear membrane has many pores or circular structures or annuli
A.	Fawcell
B.	Strasburger
C.	Butchen
D.	Callan and Tomlin
Answer» E.

Discussion

14378.	The nucleus has [CBSE PMT 1993]
A.	One membrane with pores
B.	Two membranes with pores
C.	Two membranes with pores through which substances do not pass
D.	Two membranes with pores through which macromolecules may pass
Answer» E.

Discussion

14379.	Controlling centre of cell is [AFMC 1996]
A.	Nucleus
B.	Nucleolus
C.	Mitochondria
D.	Ribosome
Answer» B. Nucleolus

Discussion

14380.	\[{{F}_{1}}\]particles are also called [Pune CET 1998]
A.	Electron transport particles
B.	Elementary particles
C.	Cytochromes
D.	Cristae
Answer» C. Cytochromes

Discussion

14381.	Which of the following is present in mitochondria [MP PMT 2002]
A.	Polysome
B.	Monosome
C.	Quantasome
D.	Oxysome
Answer» E.

Discussion

14382.	In which part of mitochondria, ATP is generated [AIIMS 1984, 86]
A.	Matrix
B.	Cristae
C.	Outer membrane
D.	F1 particles (oxysomes)
Answer» E.

Discussion

14383.	Mitochondria are non-existent in [MP PMT 1994]
A.	Red algae
B.	Some bacteria
C.	Green algae
D.	Brown algae
Answer» C. Green algae

Discussion

14384.	Mitochondria are the store houses or power house of [KCET 1994; MP PMT 2003]
A.	Fats
B.	ATP
C.	Glucose
D.	Glycogen
Answer» C. Glucose

Discussion

14385.	Which cell organelle participates in photo-respiration
A.	Chloroplast
B.	Peroxisome
C.	Mitochondria
D.	All the above
Answer» E.

Discussion

14386.	The "marker'' enzyme of lysosome is [BHU 1991]
A.	Lysozyme (muramidase)
B.	Acid protease
C.	Acid phosphatase
D.	Beta-galactosidase
Answer» D. Beta-galactosidase

Discussion

14387.	In an old science fiction movie, the hero tried to drown a giant ant by holding its head under water. Would this work? Why?
A.	Yes, Ants use lungs to breathe much as we do.
B.	Yes, The skin surface, covered with water, could not get \[{{O}_{2}}\] from the air.
C.	No, Ants use gills for respiration, like crabs do.
D.	No, Ants breathe through holes in the sides of their bodies.
Answer» E.

Discussion

14388.	Asthma is caused due to:
A.	Infection of lungs
B.	Spasm in bronchial muscles
C.	Bleeding into pleural cavity
D.	Infection of trachea
Answer» C. Bleeding into pleural cavity

Discussion

14389.	The process of migration of chloride ions from plasma to RBC and carbonate ions from RBC to plasma is:
A.	Chloride shift
B.	Ionic shift
C.	Atomic shift
D.	\[N{{a}^{+}}\] pump
Answer» B. Ionic shift

Discussion

14390.	Presence of large number of alveoli around alveolar ducts opening into bronchioles in mammalian lungs is:
A.	Inefficient system of ventilation with little of residual air.
B.	Inefficient system of ventilation with high percentage of residual air.
C.	An efficient system of ventilation with no residual air.
D.	An efficient system of ventilation with little residual air.
Answer» E.

Discussion

14391.	In the given figure, label A represents_____ while label B represents ______.
A.	A- Trachea, B- Bronchus
B.	A- Alveolus, B- Bronchiole
C.	A- Bronchiole, B- Trachea
D.	A- Trachea, B- Bronchiole
Answer» E.

Discussion

14392.	Amount of \[{{O}_{2}}\] normally carried by 100 mL of pure blood is:
A.	40 mL
B.	20 mL
C.	10 mL
D.	30 mL
Answer» C. 10 mL

Discussion

14393.	Smoking destroys the cilia in the respiratory passage ways. This:
A.	Makes it harder to move air in and out of the lungs.
B.	Decreases the surface area for respiration.
C.	Slows blood flow through lung blood vessels.
D.	Makes it harder to keep the lungs clean.
Answer» E.

Discussion

14394.	The chloride shift in red blood cells is the movement of:
A.	Cations into the cell to balance its uptake of chloride ions.
B.	Chloride ions from the blood into the glomerular filtrate for excretion.
C.	Chloride ions out of the cell to balance the release of hydrogen carbonate ions.
D.	Chloride ions into the cell to balance its uptake of hydrogen carbonate ions.
Answer» D. Chloride ions into the cell to balance its uptake of hydrogen carbonate ions.

Discussion

14395.	Consider the statements and choose the correct option. (i) Proteins contributes 6-8% of the blood plasma. (ii) Plasma contain very high amount of minerals. (iii) Plasma without the clotting factors is called serum. (iv) Glucose, amino acids, lipids, etc., are also present in the plasma as they are always in transit in the body.
A.	All are correct
B.	Only (ii) is false
C.	Only (i) is correct
D.	All are false
Answer» C. Only (i) is correct

Discussion

14396.	PR interval in a normal ECG, at heart beat of 70/min is approximately:
A.	180ms
B.	80ms
C.	8ms
D.	320ms
Answer» B. 80ms

Discussion

14397.	Match the blood vessels of human heart listed under column-I with the functions given under column-II; Choose the answer which gives the correct combination of both columns. Column-I (Blood vessel) Column-II (Function) A. Superior vena cava I. Carries deoxygenated blood to lungs B. Inferior vena cava II. Carries oxygenated blood to lungs C. Pulmonary artery III. Brings deoxygenated blood from lower Part of the body to the right atrium D. Pulmonary vein IV. Brings oxygenataed blood to the left atrium V. Brings oxygenated blood from upper parts of the body into the right atrium
A.	A-V; B-I; C-III; D-II
B.	A-V; B-III; C-I; D-IV
C.	A-IV; B-V; C-III; D-I
D.	A-V; B-I; C-II; D-III
Answer» C. A-IV; B-V; C-III; D-I

Discussion

14398.	Heart beats are accelerated by:
A.	Cranial nerves and acetylcholine
B.	Sympathetic nerves and acetylcholine
C.	Cranial nerves and adrenaline
D.	Sympathetic nerves and epinephrine
Answer» E.

Discussion

14399.	QRST is related with:
A.	Ventricular contraction or depolarization
B.	Auricular contraction
C.	Auricular relaxation
D.	Cardiac cycle
Answer» B. Auricular contraction

Discussion

14400.	If cardiac output is 6.0 L/min and 1.44 L of urine is formed daily, what percentage of flow in the nephrons and collecting ducts is reabsorbed (kidneys receive 20% of cardiac output)?
A.	0.001
B.	0.0002
C.	0.999
D.	Data insufficient
Answer» E.

Discussion

Explore topic-wise MCQs in NEET.

The following diagram represents a structure of chromosome. Identify the structures of marked as 1, 2 and 3.

In prokaryotes, chromatophores are:

Which one of the following pairs is not incorrectly matched?

The ribosomes are made up of:

Cyclosis is [KCET 1994; RPMT 1997]

Protoplasm found inside the nucleus is known as [CPMT 1979]

Red colour of tomato is due to [Orissa JEE 2004]

Plant cell is differ from animal cell because of [MP PMT 2003]

A typical parenchyma cell does not contain [CPMT 1987]

When green tomatoes fruits turn to red, then [AFMC 1987, 2003]

Cytochrome is found in [CPMT 1980]

The term chromatophore was coined by [AIIMS 1998]

Which of the following layer is present nearest to plasma membrane in plant cell [AFMC 2002]

Lomasomes are found in [BVP 2000]

Which one of the following activator remains attached with ATP in plasma membrane

Which is the latest model that is proposed to explain the structure of plasma membrane [DPMT 1981; BHU 2001; CBSE PMT 2002; BVP 2003]

Size of molecules that can pass through plasma membrane is [AMU 1991]

When a cell engulfs or surrounds a particle and forms a vesicle around it, the phenomenon is known as [AMU 1990]

Which of the following does not require carrier molecules during transport through cell membranes [BHU 1994]

DNA genetic material occurs by itself in lower organisms and combined with proteins as nucleoproteins in higher organisms. The nucleoprotein is organized in higher forms to form

The nucleoplasm is continuous with the cytoplasm of a cell through [MP PMT 1994]

Centromere is part of [CBSE PMT 1997; BHU 2002; MP PMT 2003]

Which of the following are used to define the karyotype of a species 1. The number of chromosomes 2. The chromosome length 3. The positions of the centromeres Code : [MP PMT 1993]

A chromosome in which the centromere is situated near one end is known as [MP PMT 1998, 2002; AIIMS 2002]

DNA is mainly found in [CBSE PMT 1999]

Who showed that the nuclear membrane has many pores or circular structures or annuli

The nucleus has [CBSE PMT 1993]

Controlling centre of cell is [AFMC 1996]

\[{{F}_{1}}\]particles are also called [Pune CET 1998]

Which of the following is present in mitochondria [MP PMT 2002]

In which part of mitochondria, ATP is generated [AIIMS 1984, 86]

Mitochondria are non-existent in [MP PMT 1994]

Mitochondria are the store houses or power house of [KCET 1994; MP PMT 2003]

Which cell organelle participates in photo-respiration

The "marker'' enzyme of lysosome is [BHU 1991]

In an old science fiction movie, the hero tried to drown a giant ant by holding its head under water. Would this work? Why?

Asthma is caused due to:

The process of migration of chloride ions from plasma to RBC and carbonate ions from RBC to plasma is:

Presence of large number of alveoli around alveolar ducts opening into bronchioles in mammalian lungs is:

In the given figure, label A represents_____ while label B represents ______.

Amount of \[{{O}_{2}}\] normally carried by 100 mL of pure blood is:

Smoking destroys the cilia in the respiratory passage ways. This:

The chloride shift in red blood cells is the movement of:

PR interval in a normal ECG, at heart beat of 70/min is approximately:

Heart beats are accelerated by:

QRST is related with:

If cardiac output is 6.0 L/min and 1.44 L of urine is formed daily, what percentage of flow in the nephrons and collecting ducts is reabsorbed (kidneys receive 20% of cardiac output)?

In the given figure, label A represents_ while label B represents __.