ATI Biology Practice Test 2

Question 1

Which organelle is responsible for producing ATP through oxidative phosphorylation?

Accepted Answer

Mitochondria

Answer

Mitochondria are the powerhouse of the cell, producing ATP through oxidative phosphorylation during cellular respiration.

Question 2

During DNA replication, which enzyme unwinds the double helix at the replication fork?

Accepted Answer

Helicase

Answer

Helicase unwinds the double-stranded DNA by breaking hydrogen bonds between complementary base pairs at the replication fork.

Question 3

What is the primary function of transfer RNA (tRNA) during translation?

Accepted Answer

Delivering amino acids to the ribosome

Answer

Transfer RNA carries specific amino acids to the ribosome during translation, matching its anticodon to the mRNA codon.

Question 4

Which type of inheritance pattern is demonstrated when both alleles are fully expressed in the heterozygous phenotype?

Accepted Answer

Codominance

Answer

Codominance occurs when both alleles in a heterozygote are fully and simultaneously expressed, such as AB blood type.

Question 5

Which process describes the movement of water across a selectively permeable membrane from an area of lower solute concentration to higher solute concentration?

Accepted Answer

Osmosis

Answer

Osmosis is the passive movement of water molecules across a selectively permeable membrane toward the region of higher solute concentration.

HESI (ATI) Practice Test

HESI (ATI) Practice Test

ATI Biology Practice Test 2