NEET Biology: Medical Entrance Biology Questions and Answers

Useful for Medical Entrance Exams

MCQ on Digestion and Absorption

1. Choose the correct enzyme substrate pair
a) rennin - casein
b)amylase-protein
c)lipase- carbohydrate
d) maltase-lactose

2. The enzyme enterokinase helps in the conversion of
a)caesinogen into caesin
b)trypsinogen into trypsin
c)pepsinogen into pepsin
d)proteins into polypaptides

3.Which one of the following vitamins can be synthesised by bacteria inside the gut?
a)D
b)K
c)C
d)B1

4. Duodenum has characteristic Brunner’s gland which secrete two hormones called
a)kinase, estrogen
b)secretin, cholecystokinin
c)prolactin, parathormone
d)estradiol, progesterone

5. A patient is generally advised to specially, consume more meat, lentils, milk and eggs in diet only when he suffers from
a)scurvy
b)anemia
c)rickets
d)kwashiorkor

6. Water is mostly absorbed in
a)colon
b)esophagus
c)small intestine
d)stomach

7. Which of the following is the largest gland in an adult man
a)thyroid
b)pancreas
c)thymus
d)liver

8.The epithelial surface area of large intestine---of the small intestine.
a)1/5th
b)1/10th
c)1/3th
d)1/12th

9. Balanced diet should have
a) 1/5 protein, 1/5 fats and 3/5 carbohydrates
b) 1/5 protein, 3/5 fats and 3/5 carbohydrates
c) 1/2 protein, 1/4 fats and 3/5 carbohydrates
d) 3/5 protein, 1/5 fats and 1/5 carbohydrates

10. Imbalances of certain hormones, deficiencies of calcium and vitamin D are major causative factors of
a)rheumatoid arthritis
b)lipoproteins
c)gouty arthritis
d)osteoporosis
Answers
1. a) rennin - casein
2. b)trypsinogen into trypsin
3. b)K
4. b)secretin, cholecystokinin
5. d)kwashiorkor
6. a)colon
7. d)liver
8. b)1/10th
9. a) 1/5 protein, 1/5 fats and 3/5 carbohydrates

10. d)osteoporosis
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MCQ on Photosynthesis

1. One molecule of glucose in Calvin cycle is formed from
a)6CO2 + 12 ATP
b) 6CO2 + 30 ATP+12NADPH
c) 6CO2 + 18 ATP+12NADPH
d) 6CO2 + 18 ATP+30NADPH

2. Which of the following is wrongly matched?
a)sorghum- Kranz anatomy
b) PEP carboxylase- mesophyll cells
c)Blackman-law of limiting factors
d)photorespiration- C3 plants
e) PSII-P700

3. The mineral involved in water spitting reaction during photosynthesis are
a) potassium and maganese
b) magnesium and chlorine
c) manganese and chlorine
d) magnesium and chlorine

4.  Example of water soluble plant pigment is
a)chlorophyll a
b) chlorophyll b
c) anthocyanin
d) xanthophyll

5. Select the incorrect matched pair with regard to C4 cycle.
a) primary CO2 fixation product -PGA
b) c4 pant- maize
c)location of enzyme RuBisCO- bundle sheath cells
d)site of initial carboxylation- mesophyll cells

6. Light reaction of photosynthesis occurs inside
Light reactions and Calvin cycle

a) stroma
b) grana
c) endoplasmic reticulum
d) cytoplasm

7.Non cyclic photophosphorylation results in the production of
a) ADP
b)NADPH
c)ATP and NADPH
d) NADPH

8. Electrons from excited chlorophyll molecules of photosystem II are accepted first by
a)ferredoxin
b)pheophytin
c)cytochrome b
d) cytochrome f

9. Statement A: Photorespiration decrease photosynthetic output
Statement B:In photorespiratory pathway, neither ATP nor NADPH is produced.
a) Statement A is correct and statement B is wrong
b) Both the statements A and B are correct.
c) Statement B is correct and statement A is wrong
d) Both statement A and B are wrong

10. Assertion: in light reaction of photosynthesis, light is required for the functioning of PS  I and PS II, and production of ATP and NADPH.
Reason: dark reaction does not occur in light
a)If both assertion and reason are true and reason is the correct explanation of assertion.
b)if both assertion and reason are false
c) if assertion is true but reason is false
d) If both assertion and reason are true but reason is not the correct explanation of assertion.

Learn more: 

Answers
1. c) 6CO+ 18 ATP+12NADPH
2. e) PSII-P700
3. c) manganese and chlorine
4. c) anthocyanin
5. a) primary CO2 fixation product -PGA
6. b) grana
7. c)ATP and NADPH
8. b)pheophytin
9. b) Both the statements A and B are correct.
10. c) if assertion is true but reason is false
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2017 NEET Biology Questions and Answers (31-40)

31. Which one of the following is related to Ex-situ conservation of threatened animals and plants?
 1. Wildlife Safari parks
 2. Biodiversity hot spots
 3.  Amazon rainforest
 4. Himalayan region

32. Select the mismatch
 1. Pinus  - Dioecious
 2. Cycas - Dioecious
 3. Salvinia- Homosporous
 4. Equisetum – Homosporous

33. Which of the following facilitates opening of stomatal aperture ?
1. Contraction of outer wall of guard cells
2. Decrease in turgidity of guard cells
3. Radial orientation of cellulose microfibril in the cell wall of guard cells
4. Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells

34. The association of histone H1 with a nucleosome indicates :
1. Transcription is occurring.
2. DNA replication is occurring
3. The DNA is condensed into a Chromatin  Flbre.
4.  The DNA double helix is exposed.

35. DNA fragments are:
1.  Positively charged
2. Negatively charged
3.  Neutral
4.  Either Positively or negatively charged depending on their size

36. Capacitation occurs in:
1.  Rete testis
2. Epididymis
3. Vas deferens
4.  female reproductive tract

37. Which ecosystem has the maximum biomass?
1.  Forest ecosystem
2. Grassland ecosystem
3. Pond ecosystem
4 Lake ecosystem

38. A disease caused by an autosomal primary non-disiunction is :
1. Down's  Syndrome
2. Klinefelter's Syndrome
3. Tumer's  Syndrome
4. Sickle Cell Anemia

39. Life cycle of Ectocarpus and Fucus respectively
1.  Haplontic, Diplontic
2.  diplontic, haplodiplontic
3. haplodiplontic, diplontic
4. Haplodiptontic Haplontic


40.  If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered ?
1. 1
2. 11
3. 33

4. 333
2017 NEET Biology Questions and Answers (31-40)
Answers:
31.  1. Wildlife Safari parks
32.  1. Pinus  - Dioecious
33. 3. Radial orientation of cellulose microfibril in the cell wall of guard cells
34. 3. The DNA is condensed into a Chromatin  Flbre.
35. 2. Negatively charged
36. 4.  female reproductive tract
37. 1.  Forest ecosystem
38. 1. Down's  Syndrome
39. 3. haplodiplontic, diplontic
40. 3. 33
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