Honors Bio Unit 4.2: DNA Structure

How do we describe the structure of the molecule shown?

• Double Helix
• Wavy Watson
• Curly Crick
• Triple Twisty

Tags

NGSS.HS-LS1-1

The table shows the results of measuring the percentages of the four bases in the DNA of several different organisms. Some of the values are missing from the table. Based on your knowledge of base pairing, the percentages of guanine bases in chicken DNA should be approximately what?

• 28.8%

• 19.9%

• 21.5%

• 13.4%

The percentage of thymine in the DNA of the bacterium (S. lutea) in the table, should be approximately what?

• 13.4%.
• 73.2%.
• 36.6%.
• 29.4%.

All of the following statements are true of a DNA molecule except that it-

• is made up of lipids.

• contains nucleotides.

• stores genetic information.

• can be duplicated.

Tags

NGSS.HS-LS1-1

Which variable component of DNA holds the "code" for the traits of an organism?

• sugars (deoxyribose)

• hydrogen bonds

• phosphate groups

• nitrogenous base pairs

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

What is responsible for holding the two strands of the DNA double helix together?

• hydrogen bonds
• extremely strong bonds
• phosphate forces
• sticky sugars

Tags

NGSS.HS-LS1-1

Nucleotides are composed of which 3 molecules?

• sugar, protein, and nitrogenous bases.
• protein, nitrogenous bases, and phosphate.
• nitrogenous bases, phosphate, and RNA.
• sugar, phosphate, and nitrogenous bases.

Tags

NGSS.HS-LS1-1

Name this entire structure

• double helix
• nucleotide
• twisted ladder
• nitrogenous base

Tags

NGSS.HS-LS1-1

The yellow portion of this molecule is called:

• the phosphate group
• nitrogen base
• pentose sugar
• double helix

The blue portion of this molecule is called:

• the phosphate group
• nitrogen base
• pentose sugar (deoxyribose)
• double helix