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HESI A2 biology practice questions, set 11

HESI A2 · biology

HESI A2 biology practice questions set 11

You cover cells, genetics, and life processes at the depth entrance exams actually ask. Five of the 15 questions include the correct answer and rationale. The other ten keep answers in the study hub. Continue with the HESI A2 exam guide or more HESI A2 practice questions.

Five biology questions with answers

Cover the key. Write the first action. Then open the rationale and name why the other choices fail.

Question 1

Two organisms live in a relationship from which both benefit. What is this called?

  1. A. Mutualism
  2. B. Parasitism
  3. C. Commensalism
  4. D. Competition
Show answer and rationale

Correct answer: A — Mutualism

Mutualism is a type of symbiotic relationship between two organisms in which both parties benefit from the association. It is a mutually beneficial interaction where both organisms gain something valuable, such as food, protection, or some other resource. This contrasts with parasitism, where one organism benefits at the expense of the other, commensalism, where one organism benefits while the other is unaffected, and competition, where both organisms are negatively affected by their interaction.

Question 2

Where is the site of cellular respiration in eukaryotic cells?

  1. A. Nucleus
  2. B. Chloroplasts
  3. C. Mitochondria
  4. D. Ribosomes
Show answer and rationale

Correct answer: C — Mitochondria

The correct answer is C: Mitochondria. Mitochondria are often referred to as the powerhouse of the cell because they are responsible for cellular respiration in eukaryotic cells. During cellular respiration, mitochondria generate energy in the form of ATP. Choices A, B, and D are incorrect. The nucleus is the organelle that houses the cell's genetic material, chloroplasts are responsible for photosynthesis in plant cells, and ribosomes are involved in protein synthesis, not cellular respiration.

Question 3

Which of the following describes the situation where one allele takes a different form from another in a gene?

  1. A. phenotype
  2. B. heterozygous
  3. C. homolog
  4. D. homozygous
Show answer and rationale

Correct answer: B — heterozygous

Heterozygous is the term used to describe the genotype of an individual with two different alleles for a specific gene. In this case, one allele takes a different form from another, resulting in genetic diversity and variation in trait expression. The other choices are incorrect: 'phenotype' refers to the observable traits of an organism, 'homolog' typically refers to chromosomes that are similar in structure, and 'homozygous' describes the genotype where both alleles for a gene are the same.

Question 4

What is the process of cell division that results in two daughter cells with identical genetic material?

  1. A. Mitosis
  2. B. Meiosis
  3. C. Binary Fission
  4. D. Budding
Show answer and rationale

Correct answer: A — Mitosis

The correct answer is A, Mitosis. Mitosis is the process of cell division in which a cell divides and produces two daughter cells that are genetically identical to the parent cell. Choice B, Meiosis, is a type of cell division that produces gametes with half the number of chromosomes. Choice C, Binary Fission, is a form of asexual reproduction in single-celled organisms. Choice D, Budding, is a form of asexual reproduction where a new organism develops from an outgrowth or bud on the parent.

Question 5

Why doesn't an antibiotic work for treating the flu?

  1. A. The antibiotic is for a different type of infection
  2. B. The antibiotic is not effective against viruses
  3. C. The antibiotic is not prescribed in a high enough dosage
  4. D. None of the above
Show answer and rationale

Correct answer: B — The antibiotic is not effective against viruses

The correct answer is B. Antibiotics are used to treat bacterial infections, not viral infections like the flu. The flu is caused by a virus, and antibiotics are ineffective against viruses. Choice A is incorrect because it does not address the fact that antibiotics do not work on viruses. Choice C is incorrect as the issue is not related to the dosage amount, but rather the nature of the infection. Choice D is incorrect as there is a specific reason why antibiotics do not work for the flu.

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Ten more HESI A2 biology questions

Stems and choices stay public so you can still reason. Correct answers and full rationales unlock with the rest of the bank.

Question 6

Which organism reproduces via binary fission?

  1. A. Mushroom
  2. B. Blue whale
  3. C. Rainbow trout
  4. D. Salmonella
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Question 7

Which is not one of the raw materials needed for cellular respiration?

  1. A. ADP
  2. B. Phosphate
  3. C. Water
  4. D. Glucose
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Question 8

A scientist needs 12 mL of a solution. They have a bottle with 12L in it. Do they have enough?

  1. A. Yes, they have exactly what they need
  2. B. Yes, they have more than what they need
  3. C. No, they do not have enough
  4. D. None of the above
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Question 9

Which organelle is responsible for organizing protein synthesis?

  1. A. Nucleus
  2. B. Ribosome
  3. C. Lysosome
  4. D. Vacuole
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Question 10

Humans, or Homo sapiens, are part of the family ___________.

  1. A. Animalia
  2. B. Hominidae
  3. C. Mammalia
  4. D. Chordata
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Question 11

Which organism reproduces via spore formation?

  1. A. Shelf fungus
  2. B. Lemon tree
  3. C. Smallmouth bass
  4. D. Staphylococcus
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Question 12

What is the second part of an organism's scientific name?

  1. A. species
  2. B. phylum
  3. C. population
  4. D. kingdom
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Question 13

Athletes are often concerned with the question of what they need in their diets to increase muscle mass and strength. What biologic molecule would you recommend that would accomplish this?

  1. A. carbohydrates
  2. B. proteins
  3. C. lipids
  4. D. nucleic acids
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Question 14

Which cells in the human body lack nuclei?

  1. A. Nerve cells
  2. B. Red blood cells
  3. C. Liver cells
  4. D. Connective tissue cells
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Question 15

Select the strand of DNA that would match this segment: ACTTGCA

  1. A. TGAACGT
  2. B. GACCATG
  3. C. ACTTGCA
  4. D. None of the above
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About these HESI A2 biology questions

HESI A2 biology practice questions, set 11 for nursing students in the United States. Fifteen items. Five include answers and rationales in American English.

No. Nursier is independent practice. Register through the official path named on the HESI A2 exam guide.

The first five questions already include the rationale. Start full practice to unlock the remaining keys, missed-question review, and the rest of the bank.

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