Dna Structure And Gene Expression

Question 1

Purine

Answer 1

1) double ring

2) adenine and guanine

Question 2

Pyrimidines

Answer 2

1) Single ring

2) thymine and cytosine

Question 3

Nucleotide (3 parts)

Answer 3

1) phosphate
2) sugar
3) nitrogenous containing base

Question 4

Backbone of dna

Answer 4

Alternating sugar and phosphate

Question 5

Complementary base pairing

Answer 5

A-T

C-G

Question 6

DNA replication

Answer 6

The process of copying one DNA double helix into two

Question 7

Enzymes used

Answer 7

Dna ligase and DNA polymerase

Question 8

Where does transcription take place?

Answer 8

Nucleus

Question 9

Where does translation take place

Answer 9

In the cytoplasm

Question 10

Translation

Answer 10

The sequence of mRNA bases determines the sequence of amino acids

CTG AGC CCT ACG
GAC UCG GGA UGC
Aspartic Acid Serine Glycine Cysteine

Question 11

Transcription

Answer 11

Portion of DNA serves as a template for mRNA formation

CTG AGC CCT ACG
GAC UCG GGA UGC

Question 12

The purpose of messenger RNA

Answer 12

To carry genetic information from the DNA to the ribosome for protein synthesis

Question 13

Transfer RNA

Answer 13

Brings amino acids to the ribosomes, the site of protein synthesis

Question 14

Anticodon

Answer 14

Triplets of 3 bases complementary to a codon of mRNA

Question 15

Initiation

Answer 15

Brings all the translation components together

Question 16

Elongation

Answer 16

Protein synthesis step in which a polypeptide increases in length of one amino acid at a time

Question 17

Termination

Answer 17

Final step in protein synthesis. PolyPeptide and the assembled components that carried out of protein synthesis are separated from one another

Question 18

Gene mutation

Answer 18

Permanent change in the sequence of bases of DNA

Question 19

Causes of mutations

Answer 19

Errors in replication

Mutagens