RNA

Question 1

RNA function

Answer 1

Decode DNA into proteins

Question 2

Ribosomes

Answer 2

rRNA + proteins

Question 3

Translate mRNA codons into particular amino acids

Answer 3

tRNAs

Question 4

T of F: RNA functions as genome (self-replicating in RNA viruses)

Answer 4

True

Question 5

Ribozyme

Answer 5

RNA functioning as enzyme

Question 6

Function: Cleavage and rejoining of polynucleotide chains

Answer 6

Ribozyme

Question 7

Function: RNA splicing

Answer 7

Ribozyme

Question 8

snRNA

Answer 8

Small, nuclear RNA

Question 9

Function: participate in RNA processing and DNA replication

Answer 9

snRNAs

Question 10

How are RNAs classified?

Answer 10

According to size

Question 11

Sediment coefficient

Answer 11

S, 10^-13 s

Question 12

Zonal centrifugation

Answer 12

Separates particles of different sizes

Question 13

Which RNAs do not separate as discrete fraction?

Answer 13

mRNAs

Question 14

Which RNA is most abundant ?

Answer 14

rRNA

Question 15

rRNAs fold into what degree of structure ?

Answer 15

Secondary

Question 16

RNAs required for translation

Answer 16

tRNAs

Question 17

RNAs that fit the cloverleaf model

Answer 17

tRNAs

Question 18

Specific tRNAs

Answer 18

Accept only 1 of the 20 AAs

Question 19

Isoaccepting tRNAs

Answer 19

Different tRNAs that bind the same AA

Question 20

Acceptor stem (tRNA)

Answer 20

+ Nucleotide base pairs that extend to unpaired CCA at 3’ end
+ Site of amino acid conjugation

Question 21

TSiC loop

Answer 21

Contains pseudouridine

Question 22

Anticodon

Answer 22

3 nts that interact with mRNA

Question 23

D loop

Answer 23

Contains dihydrouridine residue

Question 24

T or F: In mitochondria animals do contain full set of tRNAs

Answer 24

True

Question 25

T or F: In mitochondria plants do contain a full set of tRNAs

Answer 25

False

Question 26

Aminoacyl transferase

Answer 26

May participate in tRNA import

Question 27

T or F: In plastids plants do contain a full set of tRNAs

Answer 27

True

Question 28

T or F: Plant cytoplasmic tRNAs are similar to other eukaryotes

Answer 28

True

Question 29

Number of mRNA species =

Answer 29

Number of different proteins

Question 30

Function: Pre-mRNA splicing

Answer 30

snRNAs

Question 31

Function: Histone pre-mRNA processing, poly(A) addition

Answer 31

snRNAs

Question 32

Location of snRNAs

Answer 32

Nucleoplasm

Question 33

snoRNAs

Answer 33

Small nucleolar RNAs

Question 34

Location of snoRNAs

Answer 34

Nucleolus

Question 35

Function: Pre-rRNA processing

Answer 35

snoRNAs