Key Area 1.3 - Contol Of Gene Expression

Question 1

Amino acid

Answer 1

Unit of polypeptide structure

Question 2

Anticodon

Answer 2

Sequence of three bases on tRNA that specifies an amino acid

Question 3

Codon

Answer 3

Sequence of three bases on mRNA that specifies an amino acid

Question 4

Exon

Answer 4

Sequence of DNA that codes for a protein

Question 5

Gene expression

Answer 5

Transcription and translation

Question 6

Intron

Answer 6

Non-coding sequence of DNA

Question 7

Mature messenger RNA (mRNA)

Answer 7

Carries a copy of the DNA code to a ribosome

Question 8

Molecular interactions

Answer 8

Various chemical links joining amino acids and giving protein molecules their shape

Question 9

Peptide bonds

Answer 9

Strong chemical links in the primary structure of polypeptides

Question 10

Phenotype

Answer 10

Outward appearance of an organism

Question 11

Polypeptide

Answer 11

Short strand of amino acids

Question 12

Post-translational modification

Answer 12

Changes made to a polypeptides following translation

Question 13

Primary transcript

Answer 13

Molecule made when DNA is transcribed

Question 14

Ribosomal RNA (rRNA)

Answer 14

Type of RNA that makes up ribosomes

Question 15

Ribosome

Answer 15

Site of protein synthesis; composed of rRNA and protein

Question 16

RNA

Answer 16

Ribonucleic acid, which occurs in several forms in cells

Question 17

RNA polymerase

Answer 17

Enzyme involved in synthesis of primary transcripts from DNA

Question 18

RNA splicing

Answer 18

Joining of exons following the removal of introns from a primary transcript

Question 19

Transcription

Answer 19

Copying of a DNA sequence to make a primary transcript

Question 20

Transfer RNA (tRNA)

Answer 20

Transfers specific amino acids to the mRNA on the ribosomes

Question 21

Translation

Answer 21

Production of a polypeptide using sequences of mRNA

Question 22

Uracil

Answer 22

RNA base not found in DNA