Bio 8.4-8.7 Quiz Review

The main function of tRNA is to

• carry a message that, when translated, forms proteins.

• form a portion of ribosomes, a cell’s protein factories.

• string together complementary RNA and DNA strands.

• bring amino acids from the cytoplasm to the ribosomes.

What is the term for a three-nucleotide sequence that codes for an amino acid?

• Codon

• Base

• tRNA message

• Double helix

True or False: All of your body cells contain the same genes.

• True

• False

Tags

NGSS.HS-LS1-4

An operon consists of all the the following EXCEPT

• operator
• promoter
• regulatory gene
• genes of the operon

What does a promoter do?

• binds RNA polymerase for transcription

• binds DNA polymerase for replication

• binds the operator

• binds the repressor

The lac operon genes only become expressed if:

• lactose binds to repressor

• glucose binds to repressor

• repressor binds to operator

• lactose binds to operator

A mutation is?

• Any change in DNA
• Any change in RNA
• Any change in the genetic code

Tags

NGSS.HS-LS3-2

Which shows a mutated segment of DNA? 
ATTCGC

• UAAGCG
• TAAGCG
• TAGGCG

Tags

NGSS.HS-LS3-2

Which of the following is an example of a mutagen?

• repair enzyme

• triglyceride

• UV sunlight

• thymine

Tags

NGSS.HS-LS3-2

In prokaryotes, gene expression is regulated by controlling transcription.

• True

• False