HESI A2 BIOLOGY PRACTICE QUESTIONS WITH 100%
CORRECT ANSWERS.
1) Which organelle is responsible for protein synthesis? -- Correct Answer ✔✔
_ _ _ _ _ _ _ _ _ _ _
Ribosome
2) Why is yeast used to make bread rise? -- Correct Answer ✔✔ Yeast carries out
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
fermentation, producing ethanol and carbon dioxide _ _ _ _ _
3) How is mitosis different from meiosis? -- Correct Answer ✔✔ Meiosis creates sex
_ _ _ _ _ _ _ _ _ _ _ _ _
cells with half the # of chromosomes of the parent cell whereas mitosis creates
_ _ _ _ _ _ _ _ _ _ _ _ _ _
cells that are exact copies of each other, down to the number of chromosomes
_ _ _ _ _ _ _ _ _ _ _ _ _
4) What can be altered? -- Correct Answer ✔✔ DNA
_ _ _ _ _ _ _ _
5) What is single stranded? -- Correct Answer ✔✔ RNA
_ _ _ _ _ _ _ _
6) What contains uracil? -- Correct Answer ✔✔ RNA
_ _ _ _ _ _ _
7) What codes for proteins? -- Correct Answer ✔✔ DNA
_ _ _ _ _ _ _ _
8) 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? -- Correct
_ _ _ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ 50 percent _ _ _
9) A cell is in a solution in which the concentration of solutes is higher inside the cell
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
than outside the cell. What would you expect to happen to the cell? -- Correct
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ It will swell and probably burst/hypotonic situation
_ _ _ _ _ _ _ _
, 10) What is the purpose of phloem tissue in plant stems? -- Correct Answer ✔✔ It
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
conducts food throughout the plant, it is the system of narrow tubes that
_ _ _ _ _ _ _ _ _ _ _ _ _
transports sugars and other nutrients _ _ _ _
11) Physical factors such as temperature and pH can alter enzyme activity because they
_ _ _ _ _ _ _ _ _ _ _ _ _
have an effect on the enzyme's -- Correct Answer ✔✔ Shape, the shape of an
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
enzyme controls it's fit with its substrate.
_ _ _ _ _ _
12) Which part of a plants reproductive system is of a different gender than others? --
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Correct Answer ✔✔ Stamen (male reproductive organ)
_ _ _ _ _ _
13) What kind of symbiosis exists between a pneumonia bacterium and a human? --
_ _ _ _ _ _ _ _ _ _ _ _ _
Correct Answer ✔✔ Parasitism, one organism benefits off another
_ _ _ _ _ _ _ _
14) The scientific name for a house cat is Felis catus. This indicates the house cats
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
what? -- Correct Answer ✔✔ Genus; species
_ _ _ _ _ _
Kingdom/animalia _
Phylum/Chordata
Class/mammalia _
Order/carnivora _
Family/felidae _
Genus/ Felis _
Species/catus
15) Beeswax is an example of what kind of molecule? -- Correct Answer ✔✔ Lipid,
_ _ _ _ _ _ _ _ _ _ _ _ _ _
waxes oils and fats are lipids
_ _ _ _ _
16) What takes place in a lysosome? -- Correct Answer ✔✔ Food is digested, the
_ _ _ _ _ _ _ _ _ _ _ _ _ _
lysosome contains digestive enzymes. The job of a lysosome is to digest food for
_ _ _ _ _ _ _ _ _ _ _ _ _ _
cells and break down cells waste products
_ _ _ _ _ _
17) Which organism reproduces via binary fission? -- Correct Answer ✔✔ Salmonella
_ _ _ _ _ _ _ _ _ _
18) In which phase of cell division do the chromosomes replicate? -- Correct Answer
_ _ _ _ _ _ _ _ _ _ _ _ _
✔✔ Interphase-active phase of a cells reproductive life, the cell produces nucleic
_ _ _ _ _ _ _ _ _ _ _ _
acids and proteins and doubled its # of chromosomes
_ _ _ _ _ _ _ _
CORRECT ANSWERS.
1) Which organelle is responsible for protein synthesis? -- Correct Answer ✔✔
_ _ _ _ _ _ _ _ _ _ _
Ribosome
2) Why is yeast used to make bread rise? -- Correct Answer ✔✔ Yeast carries out
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
fermentation, producing ethanol and carbon dioxide _ _ _ _ _
3) How is mitosis different from meiosis? -- Correct Answer ✔✔ Meiosis creates sex
_ _ _ _ _ _ _ _ _ _ _ _ _
cells with half the # of chromosomes of the parent cell whereas mitosis creates
_ _ _ _ _ _ _ _ _ _ _ _ _ _
cells that are exact copies of each other, down to the number of chromosomes
_ _ _ _ _ _ _ _ _ _ _ _ _
4) What can be altered? -- Correct Answer ✔✔ DNA
_ _ _ _ _ _ _ _
5) What is single stranded? -- Correct Answer ✔✔ RNA
_ _ _ _ _ _ _ _
6) What contains uracil? -- Correct Answer ✔✔ RNA
_ _ _ _ _ _ _
7) What codes for proteins? -- Correct Answer ✔✔ DNA
_ _ _ _ _ _ _ _
8) 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? -- Correct
_ _ _ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ 50 percent _ _ _
9) A cell is in a solution in which the concentration of solutes is higher inside the cell
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
than outside the cell. What would you expect to happen to the cell? -- Correct
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Answer ✔✔ It will swell and probably burst/hypotonic situation
_ _ _ _ _ _ _ _
, 10) What is the purpose of phloem tissue in plant stems? -- Correct Answer ✔✔ It
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
conducts food throughout the plant, it is the system of narrow tubes that
_ _ _ _ _ _ _ _ _ _ _ _ _
transports sugars and other nutrients _ _ _ _
11) Physical factors such as temperature and pH can alter enzyme activity because they
_ _ _ _ _ _ _ _ _ _ _ _ _
have an effect on the enzyme's -- Correct Answer ✔✔ Shape, the shape of an
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
enzyme controls it's fit with its substrate.
_ _ _ _ _ _
12) Which part of a plants reproductive system is of a different gender than others? --
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Correct Answer ✔✔ Stamen (male reproductive organ)
_ _ _ _ _ _
13) What kind of symbiosis exists between a pneumonia bacterium and a human? --
_ _ _ _ _ _ _ _ _ _ _ _ _
Correct Answer ✔✔ Parasitism, one organism benefits off another
_ _ _ _ _ _ _ _
14) The scientific name for a house cat is Felis catus. This indicates the house cats
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _
what? -- Correct Answer ✔✔ Genus; species
_ _ _ _ _ _
Kingdom/animalia _
Phylum/Chordata
Class/mammalia _
Order/carnivora _
Family/felidae _
Genus/ Felis _
Species/catus
15) Beeswax is an example of what kind of molecule? -- Correct Answer ✔✔ Lipid,
_ _ _ _ _ _ _ _ _ _ _ _ _ _
waxes oils and fats are lipids
_ _ _ _ _
16) What takes place in a lysosome? -- Correct Answer ✔✔ Food is digested, the
_ _ _ _ _ _ _ _ _ _ _ _ _ _
lysosome contains digestive enzymes. The job of a lysosome is to digest food for
_ _ _ _ _ _ _ _ _ _ _ _ _ _
cells and break down cells waste products
_ _ _ _ _ _
17) Which organism reproduces via binary fission? -- Correct Answer ✔✔ Salmonella
_ _ _ _ _ _ _ _ _ _
18) In which phase of cell division do the chromosomes replicate? -- Correct Answer
_ _ _ _ _ _ _ _ _ _ _ _ _
✔✔ Interphase-active phase of a cells reproductive life, the cell produces nucleic
_ _ _ _ _ _ _ _ _ _ _ _
acids and proteins and doubled its # of chromosomes
_ _ _ _ _ _ _ _
