Explore topic-wise MCQs in Biology.

This section includes 5751 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.

2051.

What dose "a" and "b" indicate in the given diagram ?

A. a = Dendrite; b = Nissl's granule
B. a = Axon fibres ; b = Nucleus
C. a = Axon fibres ; b = Mitochondria
D. None of the given
Answer» E.
2052.

What is correct in context with neuron ?

A. Nissl's granule present in it are acidic
B. It's cytoplam is restricted to only cyton
C. Each neuron has one axon and one dendron
D. Cyton possesses large nucleus
Answer» E.
2053.

In which animal neverous system consist of brain, ganglion and nerve fiber ?

A. Tape-worm
B. Liver-Fluke
C. Ascaris
D. Allof the given
Answer» D. Allof the given
2054.

That is correct for unstimulated nerve- fibre ?

A. Resting potential
B. Action potential
C. Repolarization
D. Depolarization
Answer» B. Action potential
2055.

In which animal nervous system is in the form of nerve-net ?

A. Leucosolania
B. Liver-Fluke
C. Planaria
D. Hydra
Answer» E.
2056.

What is correct for the resting potential

A. On innerside of plasma membrane + ve charge & outerside -ve charge is found
B. On outerside Na+ concentrartion is less ,on innersde k + concentrtion is less
C. On outerside a plasma membrane + ve charge and innerside is -ve charge
D. Electrically it is neutral in resting stage.
Answer» D. Electrically it is neutral in resting stage.
2057.

which option shows correctly matched pairs for the column I and Column II ?

A. (P-iii), (Q-i), (R-ii)
B. (P-ii), (Q-i), (R-iii)
C. (P-iii), (Q-ii), (R-i)
D. (P-ii), (Q-iii), (R-ii)
Answer» B. (P-ii), (Q-i), (R-iii)
2058.

Which option indicates correct chronology of the changes occuring during transmission of nerve impulse ?

A. Nerve fibre - depolarization - action polential - repolarization - activation of Na+ and K+ pump
B. Nerve fibre - depolarization - action polential - activation of Na+ and K+ pump - repolarization
C. Nerve fiber - depolarization - repolarization - action polential - activation of Na+ and K+ pump
D. Nerve fiber - Activation of Na + and K+ pump - depolarization - repolarization -
Answer» B. Nerve fibre - depolarization - action polential - activation of Na+ and K+ pump - repolarization
2059.

What does "b" and "c" indicate in the given diagram in question no 4?

A. b = Synapse; c = dendrite
B. c = Synapse; c = Axon fibres
C. b = axon c = dendrit
D. b = Synaptic bulb; c = Motor nerve
Answer» D. b = Synaptic bulb; c = Motor nerve
2060.

Which of the following generally transumit nerve inpulse only to the cyton ?

A. Axon
B. Dendrite
C. Synaptic knob
D. Node of Ranvier
Answer» C. Synaptic knob
2061.

What does a and b indicate in the given diagram ?

A. Synaptic cleft
B. Synase between axon
C. Synapse between axon and dendron
D. Synapse - between two dendrite
Answer» D. Synapse - between two dendrite
2062.

Which option is correct for the correctly matched groups for the column i;column ii and column

A. (a-iv-f) (b-iii-e) (c-ii-h) (d-i-g)
B. (a-iv-e) (b-iii-f) (c-ii-g) (d-i-h)
C. (a-iii-e) (b-iv-f) (c-i-h) (d-ii-g)
D. (a-ii-h) (b-i-g) (c-iii-e) (d-iv-f)
Answer» D. (a-ii-h) (b-i-g) (c-iii-e) (d-iv-f)
2063.

What does given diagram show ? where is it found ?

A. Unipolarneuron in spinal cord
B. Bipolar neuron ; in eye of human
C. Unipolar neuron; In embroynic stage
D. Unipolar neuron in eye of human
Answer» C. Unipolar neuron; In embroynic stage
2064.

What type of process the transmission of nerve impluse is ?

A. Electromagnetic
B. Electro -chemical
C. only Elecrical
D. only Magnetic
Answer» C. only Elecrical
2065.

In context with conduction of nerve impulse,what is the function of ion channels ?

A. Maintenance and change in electric potential
B. Transport of ions against diffusion gradient
C. Transport of Na+ ion to the innerside of a the membrane
D. All of the given
Answer» E.
2066.

Which of the following is used to measure membrane potential ?

A. Sphigmomanometer
B. Thermometer
C. Voltmeter
D. Galvanometer
Answer» D. Galvanometer
2067.

Which of the following option is not correct for the region labelled as "a" in the given diagram.

A. White and fatty compound
B. It is Conductive
C. Region without it called node of Ranvier
D. It is responsible for saltatary conduction
Answer» C. Region without it called node of Ranvier
2068.

Which of the given option is correct for autonomous nervous system ?

A. In it medullary sheath is very well developed
B. Node of Ranvier is present in it.
C. It is part of CNS
D. It's nerve do not travel for longer distance in body
Answer» E.
2069.

The transfer of ion through ion channel is (a) and (b)

A. a = Bidirectional, b= selectively permeable
B. a =Unidirectional, b= permeable
C. a = Bidirectional , b= semi permeable
D. a = Unidirectional, b= selectively permeable
Answer» B. a =Unidirectional, b= permeable
2070.

When sodium and potassium pump is activated, for (a) Na+ ion, (b) K+ ion are exchanged ?

A. a = one , b= two
B. a = two, b= four
C. a = two , b= three
D. a = one, b= three
Answer» D. a = one, b= three
2071.

What is the swollen, structure present at terminal end of each branch of nerve cell called ?

A. Synaptic cleft
B. synaptic vessicle
C. synapse
D. synaptic knob
Answer» E.
2072.

Which microbes cause syphilis ?

A. Neisseria gonorrhoeae
B. Treponema pollidium
C. Herpis simplex
D. Tricomonas vaginalis
Answer» C. Herpis simplex
2073.

Which part is removed in tubectorny ?

A. Funnel of fellopian tube
B. Ovaries
C. Fallopian tube
D. Uterus
Answer» D. Uterus
2074.

Which diseases is diagnosed through ELISA Test ?

A. Gonorrhoea
B. Syphilis
C. AIDS
D. Herpes
Answer» D. Herpes
2075.

What are sexually trasmitted diseases ?

A. Diseases transmitted through sexual intercourse are collectively known as...
B. Diseases spread through bacteria.
C. Diseases spread through virus.
D. Diseases spread through protozoans.
Answer» B. Diseases spread through bacteria.
2076.

Which method is mismatchen ART ?

A. IVF
B. AFT
C. ZIFT
D. GIFT
Answer» C. ZIFT
2077.

In which of the following Induced Abortion is not neccessory ?

A. There is substaintial risk the child being born with serious handicaps.
B. Where the pregnancy is the result of rape
C. When the foetus is not of desired sex.
D. Unwanted pregnancy.
Answer» D. Unwanted pregnancy.
2078.

Which microbes cause gonorrhoead ?

A. Neisseria gonorrhoeae
B. Treponema pollidium
C. Herpis simplex
D. Tricomonas vaginatis
Answer» B. Treponema pollidium
2079.

Which are the principles to prevent STD diseases ?

A. Avoid sex with umknown persons
B. Always use condom during coitus
C. In case of doubt consult a doctor and get treatment if the disease is diagnosed
D. All above
Answer» E.
2080.

What is the rate of induced abortion per year across the world in numbers ?

A. 45 to 48 million
B. 55 to 60 millions
C. 45 to 50 millions
D. 55 to 58 millions
Answer» D. 55 to 58 millions
2081.

When did Induced abortion act was passed by Indian Government ?

A. 1970
B. 1971
C. 1972
D. 1980
Answer» C. 1972
2082.

RQ = l, is

A. The multiplication O2 consumed O2 and released CQ2
B. The amount of O2, consumed and CO2 released are the same
C. One CO2 molecule more released than O2 molecule consumed
D. One O2 molecule more consumed than CO2 molecules released
Answer» C. One CO2 molecule more released than O2 molecule consumed
2083.

Which microbes causes sexually transmitted diseases ?

A. Bacteria and virus.
B. Protozoans and Fungi.
C. Nematods & viroids.
D. Both a and b.
Answer» E.
2084.

Out of following which is the symptom of Trichomoniasis ?

A. Fever and itching
B. Itching in and around vagina.
C. Liquid around vagina
D. weight loss.
Answer» C. Liquid around vagina
2085.

In Vasectomy which part is tied and cut ?

A. Epididydermis
B. Vas deferens
C. Ejeculatory duct
D. Urinogenitial duct
Answer» C. Ejeculatory duct
2086.

Give full form of ELISA ?

A. Enzyme Linked Immuno Absorbant Assay
B. Enzyme Linking Immuno Assay
C. Enzyme Live Implantations Assay
D. Enzyme Live Immuno Absorbant
Answer» B. Enzyme Linking Immuno Assay
2087.

Match following coloumns according to thair age group and amount of sexually transmitted diseases.

A. P-iii, Q-iv, R-i, S-ii
B. P-ii, Q-iv, R-i, S-iii
C. P-ii, Q-iv, R-i,S-iii
D. P-ii, Q-iii, R-iv, S-i
Answer» D. P-ii, Q-iii, R-iv, S-i
2088.

What is the meaning of infertility ?

A. Unable the produce sperms.
B. Unable to produce ova.
C. Unable the produce children
D. Unable for coitus.
Answer» D. Unable for coitus.
2089.

When did 'Induced abortion act' came in to force by Government of India ?

A. 1st April 1971
B. 1st April 1972
C. 1st April 1973
D. 1st April 1974
Answer» C. 1st April 1973
2090.

Which are the main method for the diagnosis of STDS ?

A. By detection of antibodies in blood.
B. Identification of pathogen by culturing them
C. Through a short polynucleotide chain of pathogenic organism
D. With the help of Primer
Answer» C. Through a short polynucleotide chain of pathogenic organism
2091.

Which procedure is used in prenatal diagnosis of chromosomal abnormalities ?

A. AFT
B. ART
C. IVF
D. ZIFT.
Answer» B. ART
2092.

What is the full form of PCR ?

A. Primary Chain Reaction
B. Polymerase Chain Reaction
C. Polymerase Cytosine Reaction
D. Primary Cytosine Reaction
Answer» C. Polymerase Cytosine Reaction
2093.

Which are the problems related to the legal induced abortions ?

A. Emotional and moral
B. Redigiation and social
C. Mental and physical
D. Both a and b.
Answer» E.
2094.

What do you mean induced abortion ?

A. Voluntary termination of pregnancy after foetus become viable
B. Voluntary termination of pregnancy before foetus become viable.
C. Foetus removed at imcomplete gestation months.
D. Accidently foetus is lost .
Answer» C. Foetus removed at imcomplete gestation months.
2095.

Formation of ATPs in mitochondria is known as

A. Oxidative phosphorylation
B. Cyclic photophosphorylation
C. Noncyclic photophosphorylatian
D. Fermentation
Answer» B. Cyclic photophosphorylation
2096.

How many pathogenss cause sexually trasmitted diseases through contacts ?

A. More than 20
B. Less than 20
C. More than 25
D. Less than 25
Answer» B. Less than 20
2097.

Which diseases is diagnosed by the identification of antibiodies against antigen ?

A. Gonorrhoea
B. Syphilis
C. Hepatitis
D. AIDS
Answer» E.
2098.

Net gain of glycolysis is

A. 3 ATP and 1 NADH + H+
B. 2 ATP and 2 NADH + H+
C. 6 ATP and 4 NADH + H+
D. 10 ATP and 6 NADH + H+
Answer» C. 6 ATP and 4 NADH + H+
2099.

In plant tissue culture due to which process volume of the medium is decrecse...

A. To manage the 24oc temperature for the explant.
B. Due to air exchange.
C. Due to evoperation.
D. Rotates over in rotary shaker.
Answer» D. Rotates over in rotary shaker.
2100.

Krebs cycle starts with the condensation of acetyl CoA with

A. Pyruvic aicd
B. Oxalo-acetic acid
C. Malic acid
D. Citric acid
Answer» C. Malic acid