laboursonline – MCQs, Mock Tests | NEET Test Series-2021 to 2022 NEET Biology MCQS Mock Test Paper 27

In the last step of the EMP pathway or glycolysis, this substrate is used

1. Phosphoenolpyruvate
2. Pyruvate
3. 1, 3-bisphosphoglycerate
4. Glyceraldehyde 3-phosphate

✅ Correct Answer: 1

When yeasts carry out alcoholic fermentation of glucose, the coenzyme – thiamine pyrophosphate is needed by

1. transaldolase
2. pyruvate decarboxylase
3. lactate dehydrogenase
4. hexokinase

✅ Correct Answer: 2

The activity of this enzyme increases when the ATP supply of a cell depletes

1. Glucokinase
2. Phosphofructokinase-1
3. Hexokinase
4. Pyruvate kinase

✅ Correct Answer: 2

This is not one of the steps between the glycolysis of glyceraldehyde 3-phosphate and 3-phosphoglycerate

1. formation of 1,3-bisphosphoglycerate
2. oxidation of NADH to NAD+
3. ATP synthesis
4. catalysis by phosphoglycerate kinase

✅ Correct Answer: 2

In EMP pathway, the process by which ATP is formed from ADP is

1. reduction
2. oxidative phosphorylation
3. substrate-level phosphorylation
4. photo phosphorylation

✅ Correct Answer: 3

In erythrocytes, the EMP pathway or glycolysis produces pyruvate which is metabolized further to

1. haemoglobin
2. ethanol
3. lactate
4. CO2

✅ Correct Answer: 3

This enzyme catalyzes the first step of glycolysis or the EMP pathway

1. Glucokinase
2. Pyruvate kinase
3. Phosphofructokinase-1
4. Hexokinase

✅ Correct Answer: 4

This structure is absent in frogs and present in man

1. thyroid gland
2. adrenal gland
3. salivary gland
4. pancreas

✅ Correct Answer: 3

This hormone facilitates the secretion of HCl from the stomach

1. somatomedin
2. secretin
3. gastrin
4. renin

✅ Correct Answer: 3

Pick the incorrect statement

1. cephalic phase of gastric secretion does not involve the release of gastrin
2. contraction of pyloric sphincter is caused due to large doses of gastrin
3. deficiency of intrinsic factor causes pernicious anaemia
4. gastric peristalsis includes propulsive grinding and mixing movements

✅ Correct Answer: 1

In humans, this pair of food constituents arrive at the stomach in a state of complete indigestion

1. Starch and protein
2. Fat and starch
3. Cellulose and protein
4. Cellulose and fat

✅ Correct Answer: 4

This is most likely to happen if parietal cells of the gut epithelium turn partially non-functional

1. Steapsin turns all the more effective
2. pH of the stomach will sharply decline
3. Efficiency of pancreatic enzymes will reduce particularly of lipase and trypsin
4. Inadequate hydrolysis of pepsin into peptones and proteoses

✅ Correct Answer: 4

This regulates the peristalsis of the intestine

1. Brachial plexus
2. Sacral plexus
3. Auerbach’s plexus
4. Discoidal plexus

✅ Correct Answer: 3

This is incorrect about vitamins

1. tocopherol is anti-sterility vitamin
2. vitamins are indispensable for life
3. vitamins act as a source of energy
4. vitamins are organic catalysts

✅ Correct Answer: 3

Minimum peristalsis takes place in

1. Oesophagus
2. Duodenum
3. Rectum
4. Stomach

✅ Correct Answer: 3

This prevents keratinization of the skin

1. Vitamin D
2. Vitamin C
3. Vitamin B
4. Vitamin A

✅ Correct Answer: 4

This macromineral is essential for the synthesis of insulin

1. magnesium
2. chlorine
3. iodine
4. sulphur

✅ Correct Answer: 4

In an entity with genetic composition AA+XXY such as Drosophila will be a normal female. In the case of mammals, it will be?

1. Turner
2. Klinefelter
3. Normal female
4. Normal male

✅ Correct Answer: 2

________ discovered XY sex chromosomes

1. M J D White
2. Nettil Stevans
3. R Brown
4. Mendel

✅ Correct Answer: 2

In this plant, sex determination was first studied

1. Mirabilis
2. Melandrium
3. Datura
4. Rumex

✅ Correct Answer: 2

This technique can be used to detect the chromosomal abnormality of an unborn baby

1. Tissue culture
2. Ultrasound
3. CAT Scanning
4. Amniocentesis

✅ Correct Answer: 4

A foetus’ determination of gender is dependent on

1. mother’s age
2. father’s health
3. egg’s nature
4. sperm’s nature

✅ Correct Answer: 4

This number of Barr bodies are found in a female with XXXX chromosomes

1. Four
2. Three
3. Two
4. One

✅ Correct Answer: 2

If a boy has sexual characters of that of a girl, its genotype would be

1. XYY
2. XO
3. XXY
4. XXX

✅ Correct Answer: 3

Theory of linkage was put forward by

1. De Vries
2. Sutton
3. Bateson and Punnet
4. Morgan

✅ Correct Answer: 4