Biology B Unit 1

Question 1

DNA stands for…

Answer 1

Deoxyribonucleic Acid

Question 2

DNA is unique because…

Answer 2

It contains out genetic code; it copies itself exactly

Question 3

What are the building blocks of DNA?

Answer 3

Nucleotides

Question 4

3 parts of a nucleotide…

Answer 4

Phosphate group; 5-carbon sugar (deoxyribose); Nitrogen base

Question 5

4 nitrogen bases present in DNA…

Answer 5

Adenine
Guanine
Thymine
Cytosine

Question 6

Backbone of DNA is made up of…

Answer 6

Alternating sugar (deoxyribose) and phosphate groups

Question 7

A DNA molecule is held together by…

Answer 7

Hydrogen bonds

Question 8

During DNA replication, _______ unzips the 2 strands of DNA.

Answer 8

DNA Helicase

Question 9

DNA Polymerase…

Answer 9

Assists the Hydrogen bonds in linking the complements of the old strand of DNA.

Question 10

Enzyme responsible for transcription

Answer 10

RNA Polymerase

Question 11

3 stop codons

Answer 11

UAA, UAG, UGA

Question 12

Universal start codon

Answer 12

UAG

Question 13

RNA nitrogen bases

Answer 13

Cytosine, Adenine, Uracil, Guanine

Question 14

3 types of point mutations

Answer 14

Substitution, Insertion, Deletion

Question 15

4 types of chromosomal mutations

Answer 15

Inversion, Deletion, Translocation, Duplication