HESI A2 BIOLOGY PRACTICE EXAM QUESTIONS

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HESI A2 BIOLOGY PRACTICE EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -100 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: cerebrum

Answer:

• is responsible for sensory input

Question 2: Decomposition occurs fastest in which type of environment?

• Moist, oxygenated
• Very dry, deoxygenated
• Very wet, deoxygenated
• Very dry, oxygenated

Answer:

• Moist, oxygenated

The microbes involved in decomposition need oxygen and they function quicker at higher temperatures, which is why decomposition occurs at faster rates in moist, oxygenated areas.

Question 3: Which of the following is NOT an example of an ecosystem?

• Marine
• Desert
• Ozone
• Grassland

Answer:

• Ozone

An ecosystem is the interaction between living and non-living things in their environment. The ozone does not mean this definition as living and non-living things do not live and interact there.

Question 4: What is the largest type of biological molecule?

• Lipid.
• Protein.
• Carbohydrate.
• Steroid.

Answer:

• Protein.

Question 39 Explanation:

Protein molecules are the largest type of biological molecules Question 5: What is the cilium-like structure present in certain bacteria cells that allows them to attach to a host tissue?

• Fimbria
• Cilia
• Tentacles
• Flagella

Answer:

• Fimbria

Fimbria are appendages found on many Gram-negative (and some Gram-positive) bacteria that allow them to attach to other bacteria, cells, or inanimate objects.

Question 6: Which of the following is considered an example of naturally acquired passive immunity?

• Attenuated (live) vaccine injection
• Breastfeeding
• Inactivated (killed) vaccine injection
• Exposure to a disease and subsequent immunity

Answer:

• breastfeeding

Natural passive immunity occurs when live antibodies are transferred from one individual to another, such as when anti-bodies are transferred from a mother to her baby via breast milk.

Question 7: iris

Answer:

• is the part of the eye that is pigmented

Question 8: The Krebs cycle is a process described as:

• the creation of ATP and Pyruvate.
• the creation of GTP and NADH.
• the process by which plants take in carbon dioxide and produce oxygen.
• a linear method of creating energy.

Answer:

• the creation of GTP and NADH

Question 9 Explanation:

This description is the most correct. The Krebs cycle involves creating energy in the form of 2 GTPs (which convert to ATP) and NADH (and FAHD2 which donate the electrons to the ETC), not harvesting it, and it is not only used by plants. In addition, it is cyclical, not linear. ATP and Pyruvate are created by glycolysis.

Question 9: Where do bacteria live?

• In the human body
• All of these

• In the water
• In the soil

Answer:

• all of these

Bacteria are found in various places, including soil, water, and in the human body.Question 10: Cells with a high rate of protein synthesis generally have a large number of which of the following cellular structures?

• Mitochondria.
• Ribosomes.
• Lysosomes.
• Golgi apparati.

Answer:

• Ribosomes

Question 25 Explanation:

Ribosomes aid in protein synthesis. Therefore, cells with a high rate of protein synthesis tend to have a large number of ribosomes.

Question 11: nervous tissue

Answer:

• reacts to stimuli and conducts organ impulses

Question 12: The traits which an organism shows (as opposed to what its genes code for), is known by which of the following terms?

• Phenotype.
• Genotype.
• Stereotype.
• Classification.

Answer:

• phenotype

Question 15 Explanation:

The phenotype of an organism is a demonstration of the genes expressed, rather than what they