Lecture 25 - Protein synthesis

Question 1

Protein synthesis takes place on

Answer 1

ribosomes

Question 2

Transfer RNA molecules (tRNAs) carry

Answer 2

the amino acids to the ribosomes

Question 3

Messenger RNA (mRNA) carries

Answer 3

the message with the genetic code

Question 4

The 3D structure of tRNAs is _____ shaped

Answer 4

L-

Question 5

Inosine is often found in

Answer 5

anticodons

Question 6

Inosine forms a base pair at the

Answer 6

wobble position

Question 7

Inosine maximize the number of

Answer 7

codons that can be read by a particular tRNA molecule

Question 8

The inosine bases in tRNA are formed by

Answer 8

the deamination of adenosine

Question 9

The first two bases of a codon pair in the

Answer 9

standard way

Question 10

Codons that differ in either of their first two bases must be recognized by

Answer 10

different tRNAs

Question 11

Before the anticodon recognizes the codon, the amino acids must

Answer 11

be attached to specific tRNA molecules

Question 12

The attachment of a given amino acid to a particular tRNA establishes the

Answer 12

genetic code

Question 13

The amino acid must first be _______ in order for protein synthesis to occur

Answer 13

activated

Question 14

The activated intermediates in protein synthesis are

Answer 14

amino acid esters

Question 15

Most ________ mRNAs are polycistronic

Answer 15

prokaryotic

Question 16

Most N-terminal amino acids of proteins in E. coli are

Answer 16

methionine

Question 17

In eukaryotes, the initiating amino acid is

Answer 17

methionine

Question 18

The start codon in eukaryotes is always

Answer 18

AUG

Question 19

Eukaryotes ________ have a Shine-Dalgarno sequence

Answer 19

do not

Question 20

Eukaryotes have a _______ sequence instead of a Shine-Dalgarno sequence

Answer 20

Kozak

Question 21

The structure of eukaryotic mRNA in the cytoplasm is

Answer 21

circular