Protein Synthesis

Question 1

Stop codons code for …

Answer 1

no amino acid

Question 2

Damage to DNA can be caused by

Answer 2

UV Radiation

Question 3

How does RNA differ from DNA?

Answer 3

It contains uracil and is single stranded

Question 4

What is the flow of genetic information

Answer 4

DNA-RNA-Proteins

Question 5

What is the transcription start signal?

Answer 5

The promoter

Question 6

3 codons that don’t signify amino acids are

Answer 6

stop codons

Question 7

DNA is composed of 2 strands, by what mechanism is the right one chosen?

Answer 7

The promoter aims the RNA polymerase

Question 8

How many different polymerases are in eukaryotes?

Answer 8

3

Question 9

Which molecule transfers information from one generation to the next?

Answer 9

DNA

Question 10

Which molecules transfer information from RNA to proteins?

Answer 10

tRNA

Question 11

3 RNA bases function as both…

Answer 11

codons and anticodons

Question 12

Ribosomes are a collection of … and … that are needed for …

Answer 12

proteins and small RNAs , translation

Question 13

what events must take place to ensure that the protein made Is the one specified by the mRNA?

Answer 13

tRNA must read mRNA correctly and tRNA must carry the amino acid correct for the reading

Question 14

The enzyme that charges the tRNA molecules with appropriate amino acids is

Answer 14

aminoacyl RNA synthetase

Question 15

During translation initiation, the 1st site occupied by a tRNA is the

Answer 15

p site

Question 16

Breaking and rejoining of chromosomes can lead to

a. deletions.
b. duplications.
c. inversions.
d. translocations.

Answer 16

all of the above

Question 17

What do genes code for?

a. enzymes.
b. polypeptides.
c. RNA.

Answer 17

All of the above

Question 18

Which molecules transfer messages to the cytoplasm?

Answer 18

mRNA

Question 19

Transcription is the process of…

Answer 19

the process by which the information in a strand of DNA is copied into a new molecule, RNA being produced

Question 20

Mutations are changes in the sequence of

Answer 20

Dna bases

Question 21

What is the first step of protein synthesis called?

Answer 21

Transcription

Question 22

What is the second step of protein synthesis called?

Answer 22

Translation

Question 23

Where does the first step occur?

Answer 23

In the nucleus

Question 24

Where does the second step occur?

Answer 24

in the cytoplasm on the ribosome

Question 25

A-
T-
G-
C-

Answer 25

Uracil
Adenine
Cytosine
Guanine

Question 26

Nitrogen bases are read by the ribosome … bases at a time

Answer 26

three

Question 27

Sets of three bases on the mRNA strand are called

Answer 27

codons

Question 28

Corresponding sets of codons are called

Answer 28

anticodons

Question 29

What is the start codon

Answer 29

AUG

Question 30

what are the 3 stop codons

Answer 30

UAA, UAG, UGA

Question 31

A bunch of amino acids put together makes

Answer 31

proteins

Question 32

What is the role of the RNA Polymerase?

Answer 32

Copies a DNA sequence into an RNA sequence, binds to the promoter and to the DNA strand

Question 33

What is the role of the Peptidyl transferase?

Answer 33

attaches one Amino acid to the corresponding amino acid on the chain

Question 34

aminoacyl synthatase

Answer 34

attaches the amino acid to the 3” end of the tRNA