What is the contribution of Van der Waals forces in the stability of the DNA the double helix structure? O a. They stabilize the complimentary base-pairing across the helix b. They stabilize the base stacking between adjacent nucleotides in the double helix c. They stabilize DNA packaging with histones d. They stabilize the phosphodiester backbone e. They cause the nitrogenous sugars to become more sensitive to digestion.

If C +T/A + G equals 0.5 in one strand, what is the ratio of these bases in the complementary strand? A. 0.25 B. 0.5 C. 1 D. 2 E. 4

Which of the following relations will be found in the percentages of bases of a double-stranded DNA molecule? a. A+T-G+C b. A+G=T+C A+C-G+T c. d. (A +T)/ (C+G) = 1.0 e. (A+G)/ (C+T)= 1.0 f. (A/C)=(G/T) g. (A/G)=(T/C) h. (A/T)=(G/C)

Molecules involved in DNA replication A. DNA Polymerase I B. DNA Polymerase III C. Single strand binding proteins D. Helicase E. DNA Ligase F. Primase Match each of the molecules with their specific role in DNA replication. NOTE there is only one correct molecule for each role. 1 Unwinds the helical structure of DNA and separates the two strands Prevents the two strands from reforming hydrogen bonds with each other 3 Synthesizes a short fragment of RNA to serve as a starting point for DNA replication Synthesizes most of the new DNA by using the complementary strand as a template 5 Replaces short RNA fragments with DNA Forms the final covalent bonds to make each strand of DNA a contiguous monomer of nucleotides

The DNA polymerase I uses its to remove the RNA primers during DNA replication in E. coli cells. Select one: a. 3' to 5' exonuclease activity O b. 3' to 5' DNA helicase activity O c. 5' to 3' exonuclease activity O d. 5' to 3' DNA polymerase activity

In Watson and Crick's model of DNA structure, the two strands of the DNA double helix are joined through   a. Ionic bonds   b. Hydrophobic interactions   c. Covalent bonds   d. Disulfide bonds   e. Hydrogen bonds

The function of gamma (y) complex of DNA polymerase III is to Select one: O a. to unwind double strand DNA (template DNA). O b. to associate the core DNA polymerase llI with template DNA. O c. to stimulate 5' to 3' exonuclease activity O d. to upload beta subunit of DNA polymerase III to template DNA.

In the Watson-Crick structure of DNA, the: a. adenine content of one strand must equal the thymine content of the same strand. b. nucleotides are arranged in the A-form. c. purine content (fraction of bases that are purines) must be the same in both strands. d. two strands are parallel. e. the strands are complementary to each other.

For the following sequence of amino acids, serine-valine-lysine-leucine, which of the choices below is the correct order for the nucleotide base sequence in DNA? Group of answer choices a. UGUGCAAAGUUA b. AGACAATTCAAT c. TCTCGTTTGTTA d. TGTGCTTTCTTA

Which of the following statements is correct? A. The 3’-end of a DNA double helix implies that both strands of the DNA helix have a free 3’- hydroxyl group on that end. B. DNA can form double helix while RNA cannot form double helix. C. Both A and B. D. Neither A nor B.   The role of serine at the active site of serine proteases is to act as a(n) ________ catalyst, while the histidine residue serves as a(n) ________ catalyst. A. weak; strong B. acid-base; covalent C. anionic; ionic D. covalent; acid-base E. strong; weak