Chapter 5 pretest 7th grade

DNA is made of subunits called what?

• proteins

• deoxyribonucleic acids

• traits

• nucleotides

Nucleotides are made of sugar, a phosphate, and a

• base

• protein

• gene

• ribosome

Who discovered that the amount of adenine in DNA always equals the amount of thymine?

• Rosalind Franklin

• James Watson

• Erwin Chargaff

• Francis Crick

What scientist made images of DNA by using X-ray diffraction?

• Rosalind Franklin

• James Watson

• Erwin Chargaff

• Francis Crick

What did Watson's and Crick's model of DNA look like?

• a ball

• a straight line

• links in a chain

• a long, twisted ladder

A string of nucleotides that has information for making one trait is

• a protein

• a gene

• an amino acid

• a cell

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

Each set of three bases is a code for

• a specific cell

• a specific chromosome

• a specific ribosome

• a specific amino acid

Tags

NGSS.HS-LS1-1

The first step of making a protein is

• RNA copying DNA

• tRNA matching mRNA

• mRNA going to ribosome

• amino acids linked together

Tags

NGSS.HS-LS1-1

What is the type of mutation where a base is added to the gene?

• deletion

• substitution

• insertion

• ultraviolet

Using DNA to identify who committed a crime is

• genetic engineering

• DNA fingerprints

• genetic disease

• DNA cloning