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.

2151.

To which organ the barrier of family planning shown in the diagram is attached.(image)

A. Penis
B. Vagina
C. Uterus
D. Cervix
Answer» E.
2152.

In which Assisted Reproduchive Technology the very young embryo is transferred to the woman ?

A. IVF
B. ZIFT
C. GIFT
D. ART
Answer» B. ZIFT
2153.

What is the function of copper-T (CBSE PMT-2000,BHU-2002,AFMC-2010)

A. Checks mutation
B. Stop fertilization
C. Stops zygote formation
D. Stops oblituation of blastocoel
Answer» C. Stops zygote formation
2154.

Amniocettesis involves the analysis of (MP PMT-2004)

A. Amnion
B. Body fluid of amniotes
C. Amino acids of protein
D. Amniotic fluid
Answer» E.
2155.

When does a previously frozen embryos needed ?

A. Fertilization can not occur in woman
B. To care infertility
C. Problem in coitus
D. Both a and b
Answer» E.
2156.

A contraceptive pill contains ... (BVP-2002,AFMC-2009)

A. Progesterone and estrogen
B. Oxytocin
C. Relaxin
D. None of these
Answer» B. Oxytocin
2157.

Daily oral contraceptive pill is (CBSE,PMT2011)

A. Mala C
B. Mala M and Mala D
C. Mala A
D. Mala D
Answer» C. Mala A
2158.

In amniocentesis the fluid is taken from (Kerala CET-2002)

A. Foetal blood
B. Mother's blood
C. Body fluid of mother
D. Fluid surrounding foetus
Answer» E.
2159.

In which Assisted reproductive technology and sperms are transfered in the fallopian of woman ?

A. IVF
B. ZIFT
C. GIFT
D. ART.
Answer» D. ART.
2160.

Match column I and II about Assisted Reproductive Technology and its methods and select correct option.

A. (P - ii) (Q - i) (R - iv) (S - iii)
B. (P - iv) (Q - iii) (R - ii) (S - i)
C. (P - iii) (Q - iv) (R - ii) (S - i)
D. (P - iv) (Q - iii) (R - i) (S - ii)
Answer» B. (P - iv) (Q - iii) (R - ii) (S - i)
2161.

Which option is true for the device shown in the diagram for family plannig?(image)

A. IVF
B. ART
C. IVDS
D. IFT
Answer» D. IFT
2162.

Name the cut portion shown in the diagram?(image)

A. Vas deference
B. fallopian tube
C. Epididymis
D. Urinogenital duct
Answer» B. fallopian tube
2163.

In which Assisted Reproductive technology the very young embryo is transferred to the fallopian tube insted of the uterus ?

A. IVF
B. ZIFT
C. GIFT
D. ART.
Answer» C. GIFT
2164.

In which Assisted Reproductive technology fertilization occurs in woman's body ?

A. (a) IVF
B. ZIFT
C. GIFT
D. ART.
Answer» D. ART.
2165.

Which one of the following is the most widely accepted method of contraception in india at present? (CBSE PMT-2011)

A. IUD
B. Cervical caps
C. Tubectomy
D. Diaphragms
Answer» B. Cervical caps
2166.

Yeast

A. Respires an aerobically, due to lack of mitochondria
B. Respires aerobically, if it gets O2, otherwise perform alcoholic fermentation
C. Respires aerobically
D. Can perform alcoholic fermentation
Answer» C. Respires aerobically
2167.

Medical termination of the pregnancy (MTP)is considered safe up to how many weeks of pregnancy.(CBSEPMT-2011)

A. Six week
B. Eight weeks
C. Twelve weeks
D. Eighteen weeks
Answer» D. Eighteen weeks
2168.

Saheli is (Kerala PMT-2011)

A. An oral contraceptive for female
B. A surgical sterilization method for females
C. A diaphragm for females
D. A surgical method of sterilization in male
Answer» B. A surgical sterilization method for females
2169.

Cu ions released from copper releasing Intra uterine devices (IUDS) (CBSE PMT -2010)

A. Prevent ovulation
B. Make uterus unsuitable for implantation
C. Increase phagocytosis of sperms
D. (b)and(c)both
Answer» E.
2170.

Pyruvic acid is

A. CH3COCOOH
B. CH3CHO
C. CH3CHOH COOH
D. CH3CH2OH
Answer» B. CH3CHO
2171.

R.Q. of anaerobic respiration is

A. Zero
B. Infinity
C. Less than one
D. More than one
Answer» C. Less than one
2172.

For aerobic respiration, it is essential

A. O2
B. CO2
C. CO
D. H2S
Answer» B. CO2
2173.

Which process occurs in cytosol ?

A. Photosynthesi
B. Krebs cycle
C. Glycolysis
D. Oxidative phosphorylation
Answer» D. Oxidative phosphorylation
2174.

CO2 release occurs in

A. Photosynthesi
B. Respiration
C. Transpiration
D. Guttation
Answer» C. Transpiration
2175.

CH3CH2OH represents

A. Lactic acid
B. Acetic acid
C. Ethanol
D. Pyruvic add
Answer» D. Pyruvic add
2176.

Degradation processes of a cell are referred under

A. Anabolism
B. Catabolism
C. Metabolism
D. Growth
Answer» C. Metabolism
2177.

R.Q. of carbohydrates is

A. l
B. 2
C. 3
D. 4
Answer» B. 2
2178.

Phosphorylation means

A. Formation of reduced coenzyme
B. Formation of PGA
C. Formation of ATP
D. Breakdown of ATP
Answer» D. Breakdown of ATP
2179.

Alternative pathway for respiration is

A. Photorespiration
B. Pentose phosphate pathway
C. C3 cycle
D. C4 cycle
Answer» C. C3 cycle
2180.

Respiratory substances are

A. Substances available from air
B. Nutritive substances present in food
C. Mineral elements
D. Excretory substances
Answer» C. Mineral elements
2181.

Acetaldehyde is formed from pyruvic acid, if it is removed

A. H2
B. CHO
C. 2 OH
D. CO2
Answer» E.
2182.

The metal ion present in cytochromes is

A. Copper
B. Iron
C. Magnesium
D. Zinc
Answer» C. Magnesium
2183.

R.Q. of oxalic acid is

A. Infinity
B. 4
C. 0.7
D. 1
Answer» C. 0.7
2184.

When amount of CO2 taken from atmosphere (in photosynthesis) becomes equal to the amount of CO2 released in atmosphere (in respiration), this is called

A. Final point
B. Compensation point
C. Balance point
D. Equal distribution
Answer» C. Balance point
2185.

Which of the following processes is common for aerobic and anaerobic respiration

A. Glycolysi
B. Krebs cycle
C. ETS
D. None of these
Answer» B. Krebs cycle
2186.

CH3CHO is

A. Acetaldehyde
B. Pyruvic acid
C. Ethanol
D. Lactic acid
Answer» B. Pyruvic acid
2187.

How many ATP are formed during dephosphorylation in glycolysis ?

A. 2ATP
B. 4ATP
C. 3 ATP
D. 6ATP
Answer» C. 3 ATP
2188.

Respiration type occurring in human red blood corpuscles is

A. Anaerobic
B. Aerobic
C. Both A and B
D. Fermentation
Answer» B. Aerobic
2189.

Synthetic processes of a cell comes under

A. Anabolism
B. Metabolism
C. Catabolism
D. Growth
Answer» B. Metabolism
2190.

The site of Krebs cycle in bacteria is (Bihar P.M.T. 1995)

A. Nucleoid
B. Cytoplasm
C. Plasma membrane
D. Ribosomes
Answer» D. Ribosomes
2191.

Oxidative phosphorylation occurs in

A. Mitochondria
B. Chloroplast
C. Cytoplasm
D. Golgi bodies
Answer» B. Chloroplast
2192.

R.Q. is ratio of ; (C.B.S.E.’1990;A.P.M.E.E. 1999, Glijarat GET Q.B.)

A. CO2 produced to substrate consumed
B. CO2 produced to O2 consumed
C. Oxygen consumed to water produced
D. Oxygen consumed to CO2 produced
Answer» C. Oxygen consumed to water produced
2193.

Which one can respire in the absence of oxygen ? (R.P.M.T. 1996)

A. Seed
B. Leaves
C. Stem
D. Root
Answer» B. Leaves
2194.

The end product of glycolysis of a glucose molecule is

A. Pyruvic acid, NADH2 and ADP
B. Pyruvic acid, 2H+, 2e and 4 ATP
C. 2 Pyruvic acid, 2NADH2 and ATP
D. 2 Pyruvic acid, NADH2 and 2 ATP
Answer» E.
2195.

Which one is a product of glycolysis, besides 2 ATP ? (CPMT. 1995; M.P.PMT. 1998)

A. FAD
B. NADH
C. NAD
D. NADP
Answer» C. NAD
2196.

Connecting link between glycolysis and Krebs cycle is/before entering Krebs cycle pyruvate is changed to (A.F.M.C, 1988; CB.S.E. 1992, 1997; R.PMT. 1992; M.P.P.M.T. 1987, 88, 93, 98, 2001, 2002; AMU. 1987, 2001; J.LPME.R; 1989; C.PMT. 1991, 94; D.P.M.T. 1999; A.UMS. 1994, Mampal 200l, BV. 2002, Kerala 2003, 2004)

A. Oxaloacetate
B. PEP
C. Pyruvate
D. Acetyl CoA
Answer» E.
2197.

Most of the biological energy is supplied by mitochondria through (M.P.PMT.1994, AMU. 1998)

A. Breaking of protein
B. Reduction NADP+
C. Breaking of sugars
D. Oxidising TCA substrates.
Answer» E.
2198.

Apparatus to measure rate of respiration and R.Q. is (C.P.M.T. 1991; C.B.S.E. 1992)

A. Auxanometer
B. Potometer
C. Respirometer
D. Manometer
Answer» D. Manometer
2199.

Lactic acid fermentation does not produce (A.UMS. 1996; Pb. P.M.T. 1997; AMU. 1999)

A. ATP
B. CO2 and NADH
C. CO2
D. NADH
Answer» C. CO2
2200.

Isocitric acid is changed to -oxalosucinic acid by (Tamil.Nadu2001)

A. Oxidative carboxylation
B. Oxidative decarboxylation
C. Dehydrogenation
D. Hydrogenation and decarboxylation.
Answer» C. Dehydrogenation