Unit 4 Review

Which statement best describes the relationship that exists among proteins, DNA, and cells?

• DNA is made up of proteins, which tell a cell how to function

• Cells contain DNA, which controls the production of proteins

• 
  Proteins combine to produce cells, which produce DNA

• 
  Proteins are made up of DNA, which determines the cells that are produced

Label the parts of the following diagram by dragging and dropping the correct terms on the image. 

a

b

c

d

e

Ribosome

Amino acid

protein

tRNA

mRNA

Match the following

a

b

c

d

e

f

Transcription

anticodon

codon

makes mRNA

makes protein

Translation

During the process of protein synthesis, which could cause the wrong amino acids to bond together and form an incorrect protein?

•  base pairing cytosine with guanine during translation

• 
   base pairing uracil with adenine during transcription

• deletion or addition of a base during transcription

• 
  attachment of mRNA and rRNA during translation

Which is not a step in protein synthesis?

• tRNA brings in amino acids

• mRNA travels to the ribosome

• DNA polymerase reads the mRNA

• RNA polymerase makes mRNA from DNA

Which nucleic acid is correctly paired with its function?

• mRNA: lines up amino acids at the ribosome

• DNA: forms peptide bonds between amino acids

• tRNA: moves genetic information from the nucleus to the ribosome

• mRNA: moves genetic information from the nucleus to the ribosome

Two people each have a gene that codes for a form of hemoglobin. Person #1 has a gene that encodes for normal hemoglobin, whereas Person #2 has a gene that encodes a mutated form of hemoglobin. The difference between these two genes is due to

• the sequence of phosphate groups in the double helix

• the sequence of the nitrogen bases in the DNA molecules

• the sequence of sugar and phosphate in the sides of the DNA double helix

• the sequence of deoxyribose sugar in the double helix

The pairing of ________ in DNA is the key feature that allows for genetic variation.

• deoxyribose

• hydrogen bonds

• nitrogen bases

• chromosome

Which process is represented by the series of diagrams below?

• animal cell mitosis

• plant cell mitosis

• interphase

• G phase

Reorder the following

• 
• 
• 
• 
•