DNA5

Question 1

In translation, where does recognition of tRNA happen?

Answer 1

A-site; decoding site

Question 2

In translation, where does catalysis happen?

Answer 2

P-site; transferase center

Question 3

As a whole unit, what ultracentrifuge weight does the translational rRNA have?

Answer 3

70s

Question 4

What’s the ultracentrifugal weight of small unit of translational rRNA?

Answer 4

30S

Question 5

What’s the ultracentrifugal weight of the large subunit of translational rRNA?

Answer 5

50S

Question 6

What is the role of the 30S subunit during translation?

Answer 6

hold mRNA

Question 7

what is the role of the 50S subunit in translation?

Answer 7

catalyze the peptide bond formation

Question 8

Translocation and binding of tRNA during translation is dependent on what?

Answer 8

GTP energy source

Question 9

The ….. ….. signals the end of protein synthesis.

Answer 9

release factor

Question 10

what charges tRNA with the correct amino acid?

Answer 10

tRNA Synthetases

Question 11

What marks an activated compound that is ready for transfer during translation?

Answer 11

formylation

Question 12

What is the start sequence of translation?

Answer 12

formylated methionine

Question 13

What reaction is catalyzed at the active site of the ribosome for translation?

Answer 13

lactam condensation

Question 14

How many proteins are in the prokaryotic ribosome?

Answer 14

55

Question 15

How many proteins are in eukaryotic ribosomes?

Answer 15

79-80

Question 16

There are no …… in the peptidyl transferase of the ribosome

Answer 16

proteins

Question 17

What happens to the ribosome in cells when it stalls due to stress factors?

Answer 17

rescue factors (in bacteria) dissociate translationally inactive ribosomes into their subunits

Question 18

What are two recycling factors found in bacteria?

Answer 18

GTPase and HflXr

Question 19

What is ribosomal hibernation?

Answer 19

An inactive state in which ribosomes are dissociate and bind to ‘hibernation’ factors