quiz 1

1. If the recognition sequence o tho restriction enzyme RSal. OTAC, then now many covalent bonds will be broken by the enzyme in the following DNA molecule?

5'-T-A-C-A-T-G-A-C-G-G-G-T-A-C-G-G-T-A-C-C-A-3'

3-A-T-G-T-A-C-T- G-C-C-C-A-T-G-C-C-A-T-G.G-T-5°

• 1

• 2

• 3

• 4

The recognition sites for rostriction enzymes are

• a. tautomer

• b. Pallindrome

• c. Metamere

• d.Acronym

Restriction Enzymes were primarily used as

• a. Defence by Protozoa against antibiotics

• b. Tool by Virus to cleave Bacterial

• c. Defence by Bacteria against bacteriophages viruses

• d. All of the above

In the early sequencing experiments conducted by Sanger method which modified nucleotides were used along the unmodified nucleotides?

• a. deoxyribonucleotides

• b. radioactively labelled nucleotides

• c. dideoxyribonucletides

• d. methylated nucleotides

5. What happens in the Denature step of PCR?

• a. The DNA nucleotides are broken apart

• b. The base-pairing rules for DNA are reversed

• c. The double-stranded DNA is separated into two single strands of DNA

• d. The DNA is returned to its natural setting.

6. The length of the DNA fiber in the nucleosome compaction is...

    

• a. 30A°

• b. 7A°

• C. 100A°

• d. 10A

Which is not a component of the histone octamer

• h1

• h2

• h3

• h4

Cohesin cleavage on the chromosome during meiosis I will lead to

• a. Duplication of the chromosome

• sister chromosomes

• c. separation of homologous chromosomes

• d. separation of daughter cells

Diploid cells of orangutans have 48 chromosomes. What kind of mutati had occurred during the evolution in our common ancestor that has brought the nu of chromosomes to 46 in human

• a. Duplication

• b. Deletion

• c. Translocation

• d. Monosomy

. Telomerase...

• a. is responsible for rebuilding telomeres telomeres

• b. is responsible for breaking down

• с.indicates that telomeres are absent from chromosomos

• d. is the protein coded by telomere gene