R4RIN – MCQs, Mock Tests | NEET Test Series-2021 to 2022 NEET Biology MCQS Mock Test Paper 5

This is an adulterant

1. Pesticides
2. Urea
3. Iron filings in tea
4. All of the above

✅ Correct Answer: 4

Identify the correct statement

1. Double circulation is characteristic of all vertebrates
2. Volume of blood in pulmonary circulation is more than the volume of blood in systemic circulation at any instant
3. blood pressure in pulmonary circulation is less than that of the systemic circulation
4. a double aortic arch is seen in birds and mammals

✅ Correct Answer: 3

The hepatic portal vein drains blood to the liver from

1. stomach
2. heart
3. intestine
4. kidneys

✅ Correct Answer: 3

Identify the incorrect statement

1. occurs only in mammals
2. occurs in all vertebrates
3. is composed of systemic circulation
4. is composed of pulmonary circulation

✅ Correct Answer: 2

Blood pressure in the pulmonary artery is

1. same as that in the aorta
2. less than that in venae cavae
3. more than that in the carotid
4. more than that in the pulmonary vein

✅ Correct Answer: 4

A stethoscope is used by doctors for cardiac auscultation. The second sound of each cardiac cycle is heard when

1. AV node receives signal from SA node
2. Semilunar valves close down after the blood flows into vessels from ventricles
3. AV valves open up
4. Ventricular walls vibrate due to gushing in of blood from atria

✅ Correct Answer: 2

Blood pressure is maximum in mammalian aorta during

1. diastole of the right ventricle
2. systole of the left atrium
3. diastole of the right atrium
4. systole of the left ventricle

✅ Correct Answer: 4

A patient admitted to the hospital with myocardial infarction is immediately administered with

1. Streptokinase
2. Statins
3. Cyclosporin – A
4. Penicillin

✅ Correct Answer: 1

Systemic circulation in the cardiac system refers to

1. carry red oxygenated blood
2. carry blood to the left side of the heart
3. carry blood to the right side of the heart
4. carry oxygenated blood from lungs to heart

✅ Correct Answer: 3

Oxygenated blood in the cardiac system

1. leaves from right side of the heart
2. leaves from left side of the heart
3. enters lungs from heart
4. does not leave the lungs

✅ Correct Answer: 2

This is not the locomotory organ of protozoa

1. Flagella
2. Cilia
3. Parapodia
4. Pseudopodia

✅ Correct Answer: 3

In Amoeba; excretion occurs through

1. Contractile vacuole
2. Plasmalemma
3. Parapodia
4. Nucleus

✅ Correct Answer: 2

Kingdom Protista includes

1. Amoeba; Euglena; Pseudomonas
2. Amoeba; Euglena; Escherichia
3. Amoeba; Euglena; Penicillium
4. Amoeba; Euglena; Chlamydomonas

✅ Correct Answer: 4

Entamoeba differs from amoeba in not having

1. Pseudopodia
2. Nucleus
3. Contractile vacuole
4. Ectoplasm

✅ Correct Answer: 3

Amoeba was described in detail by

1. Aristotle
2. Rosenhoff
3. Ronald Ross
4. Hirshfield

✅ Correct Answer: 4

In Amoeba; nutrition is

1. Holozoic
2. Parasitic
3. Saprobic
4. Holophytic

✅ Correct Answer: 1

Amoeba was discovered by

1. Twait
2. Hofkins
3. Jenner
4. Rosenhof

✅ Correct Answer: 4

Living amoeba is

1. Light green
2. Pale blue
3. Translucent
4. Transparent

✅ Correct Answer: 3

When touched with needle; Amoeba will

1. Split instantly
2. Die
3. Move away
4. Develop pseudopodia

✅ Correct Answer: 3

Posterior end of Amoeba is characterized by

1. Amphid
2. Lack of food vacuoles
3. Uropygium
4. Plasmid

✅ Correct Answer: 2

This is not a function of gibberellins

1. promote dormancy
2. promote cell elongation
3. promote parthenocarpic fruit formation
4. promote elongation of internodes

✅ Correct Answer: 1

Elongation or lengthening of rosette plants is obtained by treating it with

1. cytokinin
2. gibberellin
3. zeatin
4. auxin

✅ Correct Answer: 2

Generally; translocation of gibberellins is non-polar occurring through

1. capillary rise
2. phloem
3. xylem
4. both xylem and phloem

✅ Correct Answer: 2

The gibberellin involved in flowering is

1. GA1
2. GA3
3. GA4
4. GA9

✅ Correct Answer: 4

The earliest phases of synthesis of gibberellin occur in

1. plastids
2. mitochondria
3. peroxisome
4. cytoplasm

✅ Correct Answer: 1

Nullification of genetic dwarfism is possible by spraying with

1. zeatin
2. auxin
3. gibberellin
4. cytokinin

✅ Correct Answer: 3

The hormone involved in the regulation of florigen synthesis is

1. zeatin
2. gibberellin
3. ethylene
4. cytokinin

✅ Correct Answer: 2

Gibberellins found in the aleurone layer of barley increases the transcription of

1. lipase and cellulase
2. protease and amylase
3. protease and cellulase
4. lipase and protease

✅ Correct Answer: 2

This bioassay is used to test the presence of gibberellins

1. dwarf pea elongation technique
2. chlorophyll preservation test
3. excised radish cotyledon enlargement test
4. rice seedling growth inhibition test

✅ Correct Answer: 1

Gibberellins were named after a fungus known as

1. Gibberella acuminata
2. Gibberella africana
3. Gibberella fujikuroi
4. Gibberella gaditijirrii

✅ Correct Answer: 3

The control and regulation of biological processes involve some enzymes. They are known as

1. inhibitors
2. regulators
3. allosteric enzymes
4. activators

✅ Correct Answer: 3

What are the non-substrate molecules binding to the allosteric sites called?

1. allosteric substrate
2. reactants
3. allosteric modulators
4. inhibitors

✅ Correct Answer: 3

Allosteric enzymes are

1. smaller than simple enzymes
2. larger than simple enzymes
3. smaller than simple enzymes but not complex
4. larger and more complex than simple enzyme

✅ Correct Answer: 4

Allosteric enzymes consist of several

1. polypeptide chains
2. inhibitors
3. temperature ranges
4. active sites

✅ Correct Answer: 1

Allosteric enzymes possess

1. Three types of allosteric sites
2. Active site and three types of allosteric sites
3. Active site and two types of allosteric sites
4. Active site and an allosteric site

✅ Correct Answer: 4

Enzymes that are involved in the feedback inhibition are known as

1. Apoenzymes
2. Holoenzymes
3. Allosteric enzymes
4. Coenzymes

✅ Correct Answer: 3

Blocking of enzyme action by blocking its active sites is

1. feedback inhibition
2. allosteric inhibition
3. competitive inhibition
4. non-competitive inhibition

✅ Correct Answer: 3

The “Lock and key” theory of enzyme action was put forward by

1. Koshland
2. Fischer
3. Kuhne
4. Arrhenius

✅ Correct Answer: 2

The fastest enzyme is

1. carbonic anhydrase
2. pepsin
3. DNA polymerase
4. DNA gyrase

✅ Correct Answer: 1

The allosteric enzymes on the top of active sites contain

1. substrate
2. inhibitors
3. polypeptide chains
4. allosteric site

✅ Correct Answer: 4