Biology Practice Test Flashcards
6 cards from real ATI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Biology Practice Test flashcards as text
Which organelle is responsible for producing ATP through oxidative phosphorylation?
Answer: Mitochondria
Mitochondria are the powerhouse of the cell, producing ATP through oxidative phosphorylation during cellular respiration.
During DNA replication, which enzyme unwinds the double helix at the replication fork?
Answer: Helicase
Helicase unwinds the double-stranded DNA by breaking hydrogen bonds between complementary base pairs at the replication fork.
What is the primary function of transfer RNA (tRNA) during translation?
Answer: Delivering amino acids to the ribosome
Transfer RNA carries specific amino acids to the ribosome during translation, matching its anticodon to the mRNA codon.
Which type of inheritance pattern is demonstrated when both alleles are fully expressed in the heterozygous phenotype?
Answer: Codominance
Codominance occurs when both alleles in a heterozygote are fully and simultaneously expressed, such as AB blood type.
Which process describes the movement of water across a selectively permeable membrane from an area of lower solute concentration to higher solute concentration?
Answer: Osmosis
Osmosis is the passive movement of water molecules across a selectively permeable membrane toward the region of higher solute concentration.
During meiosis, genetic diversity is increased by the exchange of segments between homologous chromosomes. What is this process called?
Answer: Crossing over
Crossing over occurs during prophase I of meiosis when homologous chromosomes exchange genetic material at points called chiasmata.