RNA

Question 1

RNA structure

Answer 1

ribose sugar with bases A ,U, C, and G

Question 2

mRNA function

Answer 2

• messenger RNA
• used in transcription and translation
• copies DNA from a template strand

Question 3

mRNA structure

Answer 3

• linear strand without introns (mature mRNA) after pre-mRNA is spliced

Question 4

role of RNA

Answer 4

transfers DNA info to ribosomes to form polypeptides

Question 5

tRNA structure

Answer 5

• clover leaf shape, can fold on itself to form H+ bonds between complementary bases
• has an anticodon complementary to mRNA codon

Question 6

tRNA function

Answer 6

• transfer RNA, delivers amino acid attached at the docking site to the ribosome

Question 7

rRNA structure and function

Answer 7

• associated with proteins to make up ribosomes
• helps bind mRNA to ribosomes

Question 8

RNA polymerase

Answer 8

• enzyme that re-joins adjacent RNA nucleotides
• binding to DNA cause tension forcing h+ bonds to break

Question 9

endonuclease

Answer 9

• splices pre-mRNA to remove introns

Question 10

genetic code

Answer 10

sequence of triplet bases in mRNA that codes for a specific amino acid

Question 11

features of the genetic code

Answer 11

• universal: same codon codes for the same amino acid in all living things
• degenerate: different codons can code for the same amino acid
• non-overlapping: bases read as triplets

Question 12

role of ATP

Answer 12

• activates free nucleotides
• attaches amino acid to docking site