DNA Structure (Function)

The two strands of nitrogenous bases in DNA are joined by which type of bond?

• polar bonds

• ionic bonds

• covalent bonds

• hydrogen bonds

Tags

NGSS.HS-LS1-1

Which of the following units are repeatedly joined together to form a strand of DNA?

• amino acids

• nucleotides

• fatty acids

• polysaccharides

Which 2 molecules form the sides (backbone) of the DNA ladder?

• deoxyribose sugar and adenine

• deoxyribose sugar and a hydrogen bond

• deoxyribose sugar and the nucleus

• deoxyribose sugar and phosphate

What determines the code, or information, of a DNA molecule?

• the shape (structure) of the nitrogen bases

• the order (sequence) of the nitrogen bases

• the color of the nitrogen bases

• the frequency (number) of nitrogen bases

Tags

NGSS.HS-LS1-1

Match the letter to the part.

a

b

c

d

e

Deoxyribose Sugar

Phosphate

Hydrogen Bonds

Covalent Bond

Nitrogen Bases (2)

Tags

112.42.c.7.A

Which arrow is pointing to the sugar?

Tags

NGSS.HS-LS1-1

Challenge- How many TOTAL NUCLEOTIDES are there in the DNA molecule pictured?

• 5

• 10

• 2

• 20

Which of the following best describes the shape of a DNA molecule

• ladder

• twisted ladder

• Double helix

• Helix

In DNA, Adenine bonds with ______________.

• Guanine

• Thymine

• Cytosine

• Adenine

Guanine bonds with ______________.

• Adenine

• Guanine

• Cytosine

• Thymine