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NEET Biology Solved Question Paper 2017

Multiple Choice Questions

Fixation of one CO2 molecule through the Calvin cycle requires.

1 ATP and 2NADPH₂
2 ATP and 2NADPH₂
3 ATP and 2NADH₂
2 ATP and 1 NADPH₂

3 ATP and 2NADH₂

2 ATP is required during conversion of PGA to 1,3 diphosphoglyceric acid and 1 ATP during conversion of glyceraldehyde phosphate to ribulose biphosphate. 2NADPH2 molecules are utilised for converting 1,3 diphosphoglyceric acid to glyceraldehyde phosphate.

A plant is provided with the ideal conditions for photosynthesis and supplied with isotope 14 CO₂. When the products of the process are analysed carefully, what would be the nature of products?

Glucose and oxygen are labelled
Oxygen is labelled, but glucose is normal
Glucose and oxygen are normal
Glucose is labelled, but oxygen is normal

Glucose is labelled, but oxygen is normal

In the process of photosynthesis

$6 {CO}_{2} + 12 H_{2} O \overset{hv}{\to} C_{6} H_{12} O_{6} + 6 H_{2} O + 6 O_{2} ↑$

Plants manufacture glucose from H₂O and CO₂ and oxygen gas is released. So, due to the isotopic carbon of CO_2, only glucose will be labelled, but oxygen will be normal.

Torsion of visceral mass is seen in animals belonging to the class

Cephalopoda
Scaphopoda
Amphineura
Gastropoda

Gastropoda

Animals of class-Gastropoda of phylum-Mollusca undergo twisting of torsion of the visceral mass during development, leading to the conversion of the symmetrical embryo into an asymmetrical adult.

Oxygen dissociation curve of haemoglobin is

sigmoid
hyperbolic
linear
hypobolic

sigmoid

Oxygen-haemoglobin dissociation curve gives the relationship between the saturation of haemoglobin and oxygen tension.

The curve obtained by plotting the per cent saturation of Hb against time is sigmoid, at 38^oC and pH 7.4. Dissociation of oxyhaemoglobin can be promoted by rising in the body temperature and low pH (high CO₂)

Match the following columns.

Column I		Column II
A	Sacral nerves	1.	1 Pair
B	Thoraic nerves	2.	8 Pair
C	Cocygeal nerves	3.	7 Pairs
D	Cervical nerves	4.	12 Pairs
		5.	5 Pairs

A B C D

4 1 3 2
A B C D

5 3 1 2
A B C D

5 4 1 1
A B C D

2 5 3 1

A	B	C	D
5	4	1	1

A hormone, secreted by the endocrinal cells of duodenal mucosa which influences the releases of pancreatic juice is

relaxin
cholecystokinin
Secretin
Progesterone

cholecystokinin

Cholecystokinin Pancreozymin (CCK-PZ) is the hormone secreted from mucosa of the small intestine. It stimulates the pancreas to release enzymatic (Pancreatic) juice and gallbladder to eject bile.