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HESI BIOLOGY LATEST EXAM VERSION 2021/2022 A+ GRADE ASSURED UPDATED 2024 SUMMER
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HESI BIOLOGY LATEST EXAM VERSION2021/2022 /A+ GRADE ASSURED UPDATED 2024
SUMMER
• Which of the following statements about cell division is NOT true?
• Cell division produces daughter cells.
• Cell division involves a series of distinct stages.
• Only cells with a single set of chromosomes can undergo cell division.
• Daughter cells produced through cell division are genetically identical to the parent cell.
Answer: C. Only cells with a single set of chromosomes can undergo cell division.
Feedback: Cell division, specifically mitosis, occurs in both haploid (single set of chromosomes) and
diploid (two sets of chromosomes) cells. It's a fundamental process for growth, repair, and asexual
reproduction.
• During which type of cell division is the number of chromosomes reduced by half?
• Binary fission
• Mitosis
• Meiosis
• Cytokinesis
Answer: C. Meiosis
Feedback: Meiosis is a specialized type of cell division that produces gametes (sex cells) with half the
number of chromosomes as the parent cell. This ensures that when gametes fuse during fertilization,
the offspring inherits the correct number of chromosomes.
,• In which of the following cellular structures does the process of cellular respiration take place?
• Golgi apparatus
• Mitochondrion
• Chloroplast
• Ribosome
Answer: B. Mitochondrion
Feedback: Mitochondria are often referred to as the "powerhouses" of the cell because they are
responsible for cellular respiration, the process that converts energy from food into a usable form
(ATP).
• What term describes two alleles that are the same type?
• Homosynchronous
• Hypersynchronous
• Heterozygous
• Homozygous
Answer: D. Homozygous
Feedback: An allele is a variant form of a gene. When an individual has two identical alleles for a
particular gene, they are considered homozygous for that trait.
• A parent carries the recessive gene for a cleft chin, while the other parent does not. What is the
probability that their offspring will have a cleft chin?
• 25%
• 50%
• 0%
, • 75%
Answer: C. 0%
Feedback: If one parent carries the recessive gene (let's say "c") and the other parent does not (let's say
"C"), all offspring will inherit at least one dominant "C" allele. Since the recessive trait only manifests
when two copies of the recessive allele are present, none of the offspring will have a cleft chin.
• What are the primary products of cellular respiration?
• Water, carbon dioxide, and oxygen
• Glucose and oxygen
• Water, carbon dioxide, and adenosine triphosphate (ATP)
• Water, glucose, and oxygen
Answer: C. Water, carbon dioxide, and adenosine triphosphate (ATP)
Feedback: Cellular respiration breaks down glucose in the presence of oxygen to produce energy in the
form of ATP, along with water and carbon dioxide as byproducts.
• During which stage of mitosis do the chromosomes begin to attach to the spindle fibers and the
nuclear envelope breaks down?
• Prometaphase
• Metaphase
• Anaphase
• Prophase
Answer: A. Prometaphase
Feedback: Prometaphase is the stage where the nuclear envelope disintegrates, allowing the spindle
fibers to attach to the chromosomes at their centromeres.
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