Types Of RNA And Transcription Enzymes

Question 1

Chargaff’s rule

Answer 1

% of A = % of T

% of G = % of C

Question 2

Mitochondrial DNA

Answer 2

• encodes protein subunits, rRNA’s and tRNA’s
• High mutation rate
• Very few heterochromatic regions
• provides evidence for the evolutionary origins of species

Question 3

mRNA

Answer 3

Messenger RNA carries the transcribed RNA from DNA to ribosomes for protein synthesis

Question 4

T- RNA

Answer 4

Present amino acids to the ribosomes based off nucleotide base paring

• smallest RNA

Question 5

R-RNA

Answer 5

Forms ribosomal subunits, produced in nucleolus

• most abundant

Question 6

Mi-RNA

Answer 6

Precursor fragments for protein complex.

Question 7

Nuclease

Answer 7

Participates in processing of rRNA, tRNA, mRNA

Question 8

Peptidyl transferase

Answer 8

Catalyzes the condensation of amino acids to form polypeptides

Question 9

Sno-RNAs

Answer 9

Helps rRNA chemically modify nucleotides

Question 10

Sn-RNAs

Answer 10

Helps form spliceosomes

Mediated splicing and removal of introns

Question 11

DNA poly (Alpha)

Answer 11

• Initiates strand synthesis on the leading strand.

- Also uses primase activity to create primer at the beginning of Okazaki fragments.

Question 12

DNA poly (Beta)

Answer 12

• gap filling in DNA repair mechanisms

Question 13

DNA Poly (Gamma)

Answer 13

Replicates mitochondrial DNA

Question 14

DNA poly (Delta)

Answer 14

Elongates Okazaki fragments

Question 15

DNA poly (epsilon)

Answer 15

Elongated leading strand