IB DP SL 2.6 Quiz

Double Helix is best described as

• The name of the twisted shape of the DNA molecule, as it contains two strands.

• The specific pairing of bases in DNA: A to T and C to G

• The weak bonds that hold the two strands of DNA together.

• Guanine - the base that pairs with Cytosine

Which of these shapes most commonly represents deoxyribose sugar in a DNA diagram?

• A

• B

• C

• D

“A” is used to represent which nitrogenous base?

• the base that pairs with Thymine

• the base that pairs with Cytosine

• the base that pairs with Guanine

• the base that pairs with Adenine

Hydrogen bonds are

• the weak bonds that hold the two strands of DNA together.

• the bases that pairs with Adenine

• the specific pairing of bases in DNA: A to T and C to G

• forces that together with the sugar make the backbone of DNA

The base ‘Cytosine’ is best described as

• the base that pairs with Guanine

• the base that pairs with Thymine

• the base that pairs with Adenine

• the base that pairs with Cytosine

The letter “T” is used instead of which base in DNA?

• Thymine

• Thyroxin

• Thyroid

• Triose phosphate

Which of the descriptions best represents the Phosphate group in a DNA diagram?

• Together with the sugar it makes the backbone of DNA

• Together with the phosphate molecules makes the DNA backbone

• T- the base that pairs with Guanine

• One of four different bases. The order of these bases makes the genetic code.

Complementary base pairing is

• The specific pairing of bases in DNA: A to T and C to G

• Cytosine - the base that pairs with Guanine

• Adenine - the base that pairs with Thymine

• The specific pairing of bases in DNA: A to G and C to T

The best description for the letter “G” in a DNA diagram is

• the base that pairs with Cytosine

• the base that pairs with Thymine

• the base that pairs with Guanine

• the base that pairs with Adenine

What is a similarity between DNA and RNA?

• Both are polymers of nucleotides.

• Both are composed of antiparallel strands.

• Both contain adenine, cytosine and thymine.

• Both contain ribose sugar.