HESI A2 BIOLOGY PRACTICE QUESTIONS EXAM

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HESI A2 BIOLOGY PRACTICE QUESTIONS EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -80 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Infectious organisms that spread disease

Answer:

Pathogens

Question 2: How many pairs of homologous chromosomes do humans have?

Answer:

23 pairs for a total of 46 Question 3: What is a symbiotic relationship in which one organism benefits and the other is not affected?

Answer:

Commensalism

Question 4: Why is yeast used to make bread rise?

Answer:

Yeast carries out fermentation, producing ethanol and carbon dioxide

Question 5: Which molecule contains glucose?

Answer:

Carbohydrates Simple carbohydrates are simple sugars, complex carbohydrates are simple sugars linked with covalent bonds

Question 6: What is DNA composed of?

Answer:

Deoxyribose, a simple sugar, nitrogen based, and a phosphate group Question 7: What is the term for the breakdown of glycogen into glucose subunits?

Answer:

Hydrolysis, in hydrolysis any class of compound is broken down into subunits through the addition of water

Question 8: How do RNA and DNA derive their names?

Answer:

From the sugar each contains Question 9: In which phase of mitosis do new nuclear membranes form around sets of chromosomes?

Answer:

Telophase, the phase in which the spindle dissolves and new membranes and nucleoli form, leading to two new cells

Question 10: What contains uracil?

Answer:

RNA

Question 11: What is the function of decomposition in the carbon cycle?

Answer:

To release carbon dioxide

Question 12: What is found in animal cells but not in plant cells?

Answer:

Centriole. Vacuoles are found in plant cells but not animal cells

Question 13: Which structure is found in Protists but not in monerans?

Answer:

Golgi apparatus Question 14: Which light color would be most effective for growing green plants indoor?

Answer:

Blue

Question 15: What takes place during anaphase?

Answer:

Chromosomes move to opposite ends of the spindle

Question 16: What conducts water up through the stem of a plant?

Answer:

Xylem

Question 17: What happens to glucose during glycolysis?

Answer:

It splits into molecules of pyruvic acid Question 18: What kind of symbiosis exists between a pneumonia bacterium and a human?

Answer:

Parasitism, one organism benefits off another Question 19: Imagine that two parents both carry the recessive gene for cystic fibrosis. Any homozygous recessive offspring will manifest the disease. What percentage of the offspring is predicted to be carriers but not manifest the disease?

Answer:

50 percent

Question 20: What happens to messenger RNA as it reaches the cytoplasm?

Answer:

It attaches to a ribosome

Question 21: Two organisms live in a relationship from which both benefit

Answer:

Mutualism, both species receive mutual benefit Question 22: Which part of a plants reproductive system is of a different gender than others?

Answer:

Stamen (male reproductive organ)

Question 23: The Krebs or citric acid cycle is the third step of what?

Answer:

Carbohydrate catabolism, the breakdown of sugar. Before it begins, glucose has been broken down via glycolysis into pyruvic acid

Question 24: What are saturated fats saturated with?

Answer:

Hydrogen atoms, all carbons are attached to two hydrogen atoms

Question 25: What is the energy pyramid?

Answer:

Producers>primary consumers>secondary consumers>decomposers Question 26: Ocean waves may tear sponges into pieces each of which may grow into a new sponge what is this form of reproduction called?

Answer:

Fragmentation Question 27: 3 students measured the mass of a product of combustion. They recorded measurements of 5.14g 5.16g and 5.17g if the known mass of the product is 5.30g how would you describe the students measurements?

Answer:

Precise