biology MCQs – Page 45

Practise multiple-choice questions from biology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

biology Mcqs
881. Cellular respiration is essentially a/an _____________ process?
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A. None of the above.

B. Reduction.

C. Oxidation.

D. Redox.

882. Which of the following transmits nerve impulse from receptors to central nervous system?
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A. Motor neuron

B. Associative neuron

C. Sensory neuron

D. none of these.

883. How many vertebrae are present in vertebral column of man?
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A. 33 vertebrae

B. 33 pairs of vertebrae

C. 25 vertebrae

D. 31 vertebrae

884. Glycolysis takes place in____________?
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A. Nucleus

B. Ribosomes

C. Cytosol

D. Mitochondria.

885. Value of resting membrane potential is_____________?
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A. 0.05 V

B. 0.07 V

C. 0.09V

D. 0.03 V

886. Which of the following statement about the head of a chlorophyll molecule is incorrect?
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A. It is a porphyrin ring or tetrapyrrole ring structure

B. It is flat, square and light absorbing

C. It is hydrophobic

D. Composed of carbon and nitrogen atoms with Magnesium as central metal ion, which is coordinated with nitrogen.

887. Quantitative study of energy relationships in biological systems obeys.
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A. Bioenergetics

B. Laws of thermodynamics

C. Laws of thermo chemistry

D. Laws of chemical energetic

888. Of the following four options which one is most advanced?
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A. Hepaticopsida

B. Anthoceropsida

C. None of these

D. Bryopsida

889. The contraction of which of the following muscle fibers, is controlled by hormones?
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A. All of these

B. A skeletal muscle.

C. A cardiac muscle

D. A smooth muscle
890. Which of the following acts as thermoregulator?
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A. Cerebrum

B. Thalamus

C. Cerebellum

D. Hypothalamus
891. Cell membrane under resting conditions is impermeable to all the ions except_____________?
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A. Na+

B. Cl-

C. K+

D. PO4-2

892. Intelligence is under the control of____________?
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A. Cerebrum

B. Cerebellum

C. Thalamus

D. Hypothalamus

893. Gibberellins may be substituted for ___________ light, therefore promote flowering in long day plants?
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A. White

B. Green

C. Blue

D. Red
894. Which of the following tracheophytes are leafless?
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A. Sphenopsida

B. Prteropsida

C. Lycopsida

D. Psilopsida
895. Water is _________ times viscous than air?
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A. 50

B. 1000

C. 5000

D. 8000

896. Rapid movement of leaves of mimosa on touching is an example of _____________?
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A. Nastic movement

B. Growth movement

C. Tropic movements.

D. Turgor movement
897. Vascular Cambium initially appears as actively dividing cells between_________________?
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A. Primary xylem and primary phloem

B. Primary xylem and secondary phloem.

C. Primary Xylem and secondary xylem.

D. Secondary xylem and secondary phloem.

898. Which of the following statement about alternation of generation in bryophytes is incorrect?
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A. It involves alternation of morphologically different generations

B. Their gametophyte is independent while sporophyte depends upon gametophyte for nutrition.

C. Both the gametophyte and sporophytes are haploid generations thus can produce haploids gametes to continue the diploid number on fertilization

D. Spore formation occurs through meiosis

899. Normal action potential of a neuronal cell is ___________?
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A. plus 80 mv

B. plus 70 mv

C. plus 50 mv

D. plus 60 mv

900. The dense fluid filled region in the chloroplast is____________?
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A. None of these

B. Grana

C. Stroma

D. Thylakoid