461. What is cellulose?
A. Fats
B. Carbohydrates
C. Vitamins
(D. Protein)
462. The study of fossils is called:
A. Environmental Biology
B. Historical biology
(C. Palaeontology)
D. Social biology
463. A chemical substance that reacts with an enzyme but is not transformed into a product and thus blocks the active site is called:
A. Substrate
B. Co-factor
(C. Inhibitor)
D. Promotor
464. The experiments on DNA molecules in chromosomes for knowing the basis of inherited diseases are conducted by:
(A. Molecular biologists)
B. Microbiologists
C. Freshwater biologists
D. Social biologist
465. The percentage of water in brain cells is_______?
A. 20%
B. 65%
(C. 85%)
D. 89%
466. In 1831, the presence of the nucleus in the cells was reported by:
A. Robert Koch
B. Robert Hooke
C. Robert Mugabe
(D. Robert Brown)
467. Secretions are products formed within the cell on:
A. E.R
(B. Golgi bodies)
C. Ribosome
D. Nucleus
468. On average there are _ or more thylakoid per granum?
A. 60
B. 50
(C. 40)
D. 70
469. Un-separated replica of a chromosome is called___________?
A. Chromatin
B. Kinetochore
(C. Chromatid)
D. Centromere
470. A-biogenesis means that_____________?
A. Living things originated from bacteria
B. Mycobionts
(C. Non-living things)
D. None of these
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