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Plant Biotechnology > RNA > Flashcards

RNA Flashcards

1
Q

RNA function

A

Decode DNA into proteins

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2
Q

Ribosomes

A

rRNA + proteins

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3
Q

Translate mRNA codons into particular amino acids

A

tRNAs

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4
Q

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

A

True

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5
Q

Ribozyme

A

RNA functioning as enzyme

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6
Q

Function: Cleavage and rejoining of polynucleotide chains

A

Ribozyme

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7
Q

Function: RNA splicing

A

Ribozyme

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8
Q

snRNA

A

Small, nuclear RNA

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9
Q

Function: participate in RNA processing and DNA replication

A

snRNAs

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10
Q

How are RNAs classified?

A

According to size

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11
Q

Sediment coefficient

A

S, 10^-13 s

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12
Q

Zonal centrifugation

A

Separates particles of different sizes

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13
Q

Which RNAs do not separate as discrete fraction?

A

mRNAs

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14
Q

Which RNA is most abundant ?

A

rRNA

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15
Q

rRNAs fold into what degree of structure ?

A

Secondary

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16
Q

RNAs required for translation

A

tRNAs

17
Q

RNAs that fit the cloverleaf model

A

tRNAs

18
Q

Specific tRNAs

A

Accept only 1 of the 20 AAs

19
Q

Isoaccepting tRNAs

A

Different tRNAs that bind the same AA

20
Q

Acceptor stem (tRNA)

A

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

21
Q

TSiC loop

A

Contains pseudouridine

22
Q

Anticodon

A

3 nts that interact with mRNA

23
Q

D loop

A

Contains dihydrouridine residue

24
Q

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

A

True

25
Q

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

A

False

26
Q

Aminoacyl transferase

A

May participate in tRNA import

27
Q

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

A

True

28
Q

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

A

True

29
Q

Number of mRNA species =

A

Number of different proteins

30
Q

Function: Pre-mRNA splicing

A

snRNAs

31
Q

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

A

snRNAs

32
Q

Location of snRNAs

A

Nucleoplasm

33
Q

snoRNAs

A

Small nucleolar RNAs

34
Q

Location of snoRNAs

A

Nucleolus

35
Q

Function: Pre-rRNA processing

A

snoRNAs

Plant Biotechnology (8 decks)

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