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.MS-LS3-1

NGSS.MS-PS1-1

What are the three components of a nucleotide?

• sugar, hydrogen, nitrogen base
• sugar, oxygen, nitrogen base
• sugar, phosphate, nitrogen base
• sugar, phosphate, protein

Cytosine always pairs with

• Adenine
• Thymine
• Uracil
• Guanine

Name this structure

• double helix
• nucelotide
• twisted ladder
• hydrogen bond

Tags

NGSS.HS-LS1-1

Which organelle is DNA usually found in?

• cell membrane
• vacuole
• ribosome
• nucleus

The two strands of DNA are held together by:

• Hydrogen Bonds
• Phosphodiester Bonds
• Glycolsyl Bonds
• Glycosidic Linkages

Tags

NGSS.HS-LS1-1

a ______ codes for a particular trait. It is a distinct sequence of DNA forming part of a chromosome

• Gene

• Chromosome

• Pedigree

• Protein

Tags

NGSS.HS-LS3-1

Label the parts of the DNA helix to the right

b

c

d

e

a

phosphate

Nitrogen base

Sugar

Hydrogen bond

Covalent bond