DNA structure

What is the shape of the DNA molecule commonly referred to as?

• Single helix

• Double helix

• Triple helix

• Quadruple helix

Which components make up the sides (backbone) of the DNA ladder?

• Sugar and phosphate

• Nitrogenous bases

• Hydrogen bonds

• Amino acids

What are the four types of nitrogenous bases in DNA?

• Adenine, Thymine, Guanine, Cytosine

• Adenine, Uracil, Guanine, Cytosine

• Alanine, Thymine, Guanine, Cytosine

• Adenine, Thymine, Glycine, Cytosine

Which nitrogenous base pairs with Adenine in DNA?

• Uracil

• Guanine

• Cytosine

• Thymine

What type of bond holds the nitrogenous base pairs together?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Peptide bond

Which of the following is not a component of a nucleotide in DNA?

• Phosphate group

• Deoxyribose sugar

• Nitrogenous base

• Ribose sugar

The sequence of which of the following carries the genetic information?

• Phosphate groups

• Sugar molecules

• Nitrogenous bases

• Hydrogen bonds

Tags

NGSS.HS-LS3-1

How many hydrogen bonds are typically formed between Adenine and Thymine?

• 1

• 2

• 3

• 4

Which of the following best describes the antiparallel nature of DNA?

• The two DNA strands run in the same direction.

• The two DNA strands run in opposite directions.

• The two DNA strands are parallel but not aligned.

• The two DNA strands are coiled around each other.

What is the name of the figure on the left?

• DNA polymerase

• nitrogen base

• backbone

• Nucleotide

Tags

NGSS.HS-LS1-1