Molecular Biology Practice Test 6

1. Correct the order of occurrence of the following steps.

i. Binding of the large and small subunit
ii. Binding of mettRNA
iii. Binding of small subunit
iv. mRNA scanning

iii, iv, ii, i

ii, iii, i, iv

iv, iii, i, ii

iii, i, ii, iv

2. Both prokaryotes and Eukaryotes have one ORF.

False

True

3. In pseudouridine the attachment of Uracil base to ribose through ___________ of uracil.

C at position 5

N at position 3

N at position 1

C at position 6

4. Alternative splicing is always used to produce multiple isoforms of proteins.

False

True

5. SR proteins are not essential for RNA splicing.

True

False

6. The channel for the entry of the mRNA into the decoding center is a crucial feature for the proper decoding of them RNA.

True

False

7. In case of prokaryotes the first tRNA enters the ribosome in the ____________

P site

A site

E site

Already attached to the mRNA before ribosome association

8. Dihydrouridine is the result of oxidation of the uracil base.

False

True

9. How many reading frames are applicable in case of translation?

10. The joining of the amino acid to the tRNA requires ___________ steps.