Question

just 7, 8,9

7. The biochemical activity of a protein, such as its enzymatic activity, is called its function. a. phenotypic, b. genotypic, c. cellular, d. molecular, e. organismal 8. Which statement is NOT true of all naturally occurring DNA? a. Deoxyribose units are connected by 3'5'-phosphodiester bonds. b. The amount of A always equals the amount of T c. The ratio A+T/G+C is constant for all natural DNAS. d. The two complementary strands are antiparallel. e. Two hydrogen bonds form between A and T. 9. Which deoxyoligonucleotide will hybridize with a DNA containing the sequence (5)AGACTGGTС39? ь. (5)GACCAGTСТ3) d. (5)TCTGACCAG(3) a. (5)CTCATTGAG(3) c. (5)GAGTCAACT(3) с. (5)ТСТGGAТСТ3) 10. In living cells, nucleotides and their derivatives can serve as: b. enzyme cofactors., c. intracellular signals. e. All of the answers are correct. a carriers of metabolic energy. d precursors for nucleic acid synthesis., 11.When double-stranded DNA is heated at neutral pH, which change does NOT occur? The absorption of ultraviolet (260 nm) light increases. b. The covalent N-glycosidic bond between the base and the pentose breaks. c. The helical structure unwinds. d. The hydrogen bonds between A and T break. e. The viscosity of the solution decreases. 12. The catalog of all proteins functioning in a cell is the: c. lysosome., d. proteome., e. genome. a. metabolome.. b. proteasome., 13. Which amino acid when repeated six to ten times at the N- or C-terminal a protein allows that protein to bind to Ni2+ ions? b. His e. Asp d. Тyr, c. Ala, aGlu

Answer 1

And 8. Correct option is c.) the ratio of A+T/G+C is constant for all natural DNAs

Chargaff's rule states that the DNA from any cell of any organisms should have a 1:1 ratio(base pair rule) and the amount of Guanine should be equal to cytosine and amount of adenine should be equal to thymine.

And 9. Correct option is b.)