- In bacterial chromosomes, DNA replication typically proceeds in which direction(s) from a single origin of replication?a) Unidirectionalb) Bidirectionalc) Randomd) Opposite
- Replication is complete in bacteria when the replication forks separate from each other. (True/False)
- How do eukaryotic chromosomes differ from bacterial chromosomes in terms of origins of replication?a) Eukaryotic chromosomes have a single origin of replication.b) Eukaryotic chromosomes have bidirectional replication.c) Eukaryotic chromosomes have multiple origins of replication.d) Eukaryotic chromosomes replicate in a random fashion.
- What did Cairns' work demonstrate regarding DNA replication in bacteria?a) Formation of a replication bubble around the origin of replication.b) Replication proceeding in a unidirectional manner.c) Formation of multiple origins of replication.d) Random initiation of replication.
- In 1958, Meselson and Stahl used cesium chloride (CsCl) centrifugation to:a) Determine the structure of DNA.b) Test the models of DNA replication.c) Study the effects of mutations on DNA.d) Investigate the role of DNA in protein synthesis.
- Who proposed the dispersive model of DNA replication?a) Watson and Crickb) Blockc) Delbrückd) Meselson and Stahl
- Chargaff's Rule states that DNA from any cell of all organisms should have a ________ ratio of pyrimidine and purine bases.a) 2:1b) 1:2c) 1:1d) 3:1
- What is the diameter of the DNA double helix?a) 2 nmb) 20 nmc) 20 Åd) 2 Å
- According to Chargaff's Rule, the amount of guanine is equal to cytosine in DNA. (True/False)
- In complementary DNA nucleotide pairing, adenine (A) forms ________ hydrogen bonds with thymine (T).
- The two polynucleotide chains of a double helix are antiparallel with respect to their:a) Sugar-phosphate backboneb) Hydrogen bondsc) Adenine-thymine pairsd) Guanine-cytosine pairs
- Fill in the Blank:According to the rules of complementary DNA nucleotide pairing, cytosine (C) pairs with ________.
- What happens when the two strands of the DNA double helix align in parallel?a) Stable hydrogen bonds form.b) The charges of complementary nucleotides repel each other.c) The partial charges of complementary nucleotides align.d) The DNA structure becomes more stable.
- In complementary DNA nucleotide pairing, adenine (A) pairs with:a) Adenine (A)b) Thymine (T)c) Guanine (G)d) Cytosine (C)
- Guanine (G) pairs with cytosine (C) in complementary DNA nucleotide pairing. (True/False)
- True/False:In complementary DNA nucleotide pairing, adenine (A) always pairs with thymine (T). (True/False)
- Tautomeric shifts have no impact on the hydrogen bond potential of nucleotides. (True/False)
- The two polynucleotide chains of a double helix are antiparallel with respect to their ________ and ________ ends.
- The two polynucleotide chains of a double helix are parallel with respect to their 5' and 3' ends. (True/False)
- According to the rules of complementary DNA nucleotide pairing, what does guanine (G) pair with?a) Adenine (A)b) Thymine (T)c) Guanine (G)d) Cytosine (C)