DNA Structure

Which of the following best describes a DNA molecule?

• double helix

• contains ribose

• made of amino acids

• contains Uracil

Tags

NGSS.HS-LS1-1

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

Nitrogenous bases are joined by which type of bond?

• polar bonds

• ionic bonds

• covalent bonds

• hydrogen bonds

Tags

NGSS.HS-LS1-1

Nucleotides are made up of a sugar, phosphate, and..?

• nitrogenous base

• nucleic acid

• cholesterol

• fatty acid

Tags

NGSS.HS-LS1-1

Match the letter to the part.

a

b

c

d

e

Covalent Bond

Hydrogen Bonds

Phosphate

Deoxyribose Sugar

Nitrogen Bases (2)

Tags

112.42.c.7.A

The twisted ladder shape of DNA is called a ______________?

• twisted noddle

• winding helix

• double helix

• triple helix

adenine, guanine, cytosine, and thymine are known as

• sugars

• phosphates

• lipids

• nitrogen bases

Why is DNA important?

• it is very small and very complicated

• it's in everything

• it serves as the blueprint for traits of all living things

• because we eat it every day for energy

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

Cytosine always pairs with

• Adenine

• Thymine

• Uracil

• Guanine

Adenine (A) bonds with ______________.

• Guanine (G)

• Thymine (T)

• Cytosine (C)

• Adenine (A)