NEET Test Series-2021 to 2022 — NEET Biology MCQS Mock Test Paper 39
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1. Which of the tissue culture will form a triploid plant
A. Â endosperm
B. pollen
C. megaspore
D. ovule
Correct Option: Â endosperm
2. Â In the angiosperms, the endosperm is formed
A. before fertilization
B. after fertilization
C. along with fertilization
D. None of the above
Correct Option: after fertilization
3. Product of Krebs cycle essential for oxidative phosphorylation is _______
A. NADPH and ATP
B. Acetyl CoA
C. CO2Â and oxaloacetate
D. NADH and FADH2
Correct Option: NADH and FADH2
4. A single molecule of glucose generates _________ molecules of acetyl CoA, which enters the Krebs cycle.
A. 4
B. 3
C. 2
D. 1
Correct Option: 2
5. ________ accepts hydrogen from malate
A. FAD
B. NAD
C. NADP
D. FMN
Correct Option: NAD
6. Which of the intermediate of the Kreb’s cycle is utilised in the formation of amino acids?
A. Â Citric acid
B. Malic acid
C. Isocitric acid
D. ð›¼-ketoglutaric acid
Correct Option: ð›¼-ketoglutaric acid
7. Krebs cycle occurs in aerobic respiration due to
A. Electron transport chain requires aerobic conditions to operate
B. Oxygen is a reactant
C. Oxygen has a catalytic function
D. All of the above
Correct Option: Electron transport chain requires aerobic conditions to operate
8. Acetyl CoA is formed from pyruvate by__________ reaction
A. Dehydration
B. Â Reduction
C. Â Oxidative decarboxylation
D. Dephosphorylation
Correct Option: Â Oxidative decarboxylation
9. Which of the following is not formed during the Krebs cycle?
A. Lactate
B. Isocitrate
C. Succinate
D. Both (a) and (b)
Correct Option: Lactate
10. The entry of pyruvate into the TCA cycle is inhibited by the presence of a high cellular concentration of
A. Pyruvate
B. NADH
C. Coenzyme A
D. AMP
Correct Option: NADH
11. ATP synthesis is powered by
A. Â Coenzyme motive force
B. Â cAMP
C. proton gradient
D. GTP hydrolysis
Correct Option: proton gradient
12. FAD is reduced in which of the reaction of the Kreb’s cycle?
A. Â Isocitrate to oxaloacetate
B. Succinyl CoA to Succinate
C. Â Fumarate to malate
D. Â Succinate to fumarate
Correct Option: Â Succinate to fumarate
13. The earthworm is placed under the group
A. Polychaeta
B. Hirudinea
C. Oligochaeta
D. Crustacea
Correct Option: Oligochaeta
14. The parasite found in the seminal vesicle of earthworms are
A. Nosema
B. Â Sarcocystis
C. Monocystis
D. Nyctotherus
Correct Option: Monocystis
15. Â The typhlosole in earthworm is related to
A. respiration
B. excretion
C. absorption
D. reproduction
Correct Option: absorption
16. Colour of the body in earthworms is due to the presence of
A. Haemoglobin
B. Blood
C. Porphyrin
D. Haemocyanin
Correct Option: Porphyrin
17. Region of earthworm that is a forest of nephridia is
A. Pharyngeal region
B. Clitellar region
C. Typhlosolar region
D. Intestinal region
Correct Option: Clitellar region
18. Chloragogen cells are found in
A. Blood of earthworm
B. The coelomic fluid of the earthworm
C. Blood of cockroach
D. The body wall of leucosolenia
Correct Option: The coelomic fluid of the earthworm
19. This animal does not show any metamorphosis of larval stage
A. Asteria
B. Musca domestica
C. Pheretima Posthuma
D. Butterfly
Correct Option: Pheretima Posthuma
20. The most effective organ for food digestion in earthworm is
A. Â Mouth
B. Buccal cavity
C. Pharynx
D. Stomach
Correct Option: Pharynx
21. The typhlosole found in Pheretima occurs in
A. Stomach
B. Intestine
C. Oesophagus
D. Gizzard
Correct Option: Intestine
22. In earthworm, the mouth is located on
A. Stomium
B. Peristomium
C. Prostomium
D. Protostomium
Correct Option: Peristomium
23. The mode of communication between the neurons by sending electrical impulses known as _______.
A. Membrane potentials
B. Neuromodulators
C. Â Neurotransmitters
D. Â Action potentials
Correct Option: Â Action potentials
24. If the cell stimulation is strong, then the strength of the action potential produced would be ______.
A.  Weaker than the produced by weak stimulation
B. Stronger than the produced by weak stimulation
C. Â Double then the produced by the weak stimulation
D. Â No different to the produced by weak stimulation
Correct Option: Â No different to the produced by weak stimulation
25. Dopamine, serotonin and noradrenaline are collectively called _______.
A. Â Amines
B. Hallucinogens
C. Anxiolytics
D. Neurotransmitters
Correct Option: Â Amines
26. The excess amount of produced neurotransmitters by presynaptic neurons is __________.
A. Â Taken up by postsynaptic neurons
B. Recycled back into the presynaptic neuron
C. Removed and taken around the rest of the body
D. Eliminated by substances contained within the cell body
Correct Option: Recycled back into the presynaptic neuron
27. Acetylcholine is a neurotransmitter enabling communication between muscles and nerves. In case of an interruption in the interaction between acetylcholine and acetylcholine receptor sites on the muscles, this condition can occur in _______.
A. Botulism
B. Myasthenia gravis
C. Multiple sclerosis
D. Â Both A and B
Correct Option: Myasthenia gravis
28. Which of the following disorder causes dopamine neurons to die?
A. Seizure disorder
B. Multiple sclerosis
C. Parkinson’s disease
D.  Lou Gehrig’s disease
Correct Option: Parkinson’s disease
29. Which of the following is a genetic disorder that induces neurons in the brain to drain away and die?
A. Â Poliomyelitis
B. Encephalitis
C. Â Multiple sclerosis
D. Huntington’s disease
Correct Option: Huntington’s disease
30. Which of the following is called the common neurotransmitter?
A. Acetylcholine
B. Dopamine
C. Serotonin
D. All of the above
Correct Option: All of the above
31. The cavity of the diencephalon is known as _______.
A. First ventricle
B. Third ventricle
C. Second ventricle
D. Fourth ventricle
Correct Option: Third ventricle
32. Which of the following is the cause for transmission of nerve impulse through nerve fibre in a single direction?
A. Neurotransmitters released by dendrites.
B. Â Neurotransmitters released by axon endings.
C. Nerve fibre is insulated by a medullary sheath
D. Â None of the above.
Correct Option: Â Neurotransmitters released by axon endings.