HESI A2 BIOLOGY PRACTICE QUESTIONS
WITH CORRECT ANSWERS 2025
COMPLETE
,Which organelle is responsible for protein synthesis?
- ANSWER Ribosome
Why is yeast used to make bread rise?
- ANSWER Yeast carries out fermentation, producing
ethanol and carbon dioxide
How is mitosis different from meiosis?
- ANSWER Meiosis creates sex cells with half the # of
chromosomes of the parent cell where as mitosis creates
cells that are exact copies of each other, down to the
number of chromosomes
What can be altered?
- ANSWER DNA
What is single stranded?
- ANSWER RNA
, What contains uracil?
- ANSWER RNA
What codes for proteins?
- ANSWER DNA
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
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?
- ANSWER It will swell and probably burst/hypotonic
situation
What is the purpose of phloem tissue in plant stems?
- ANSWER It conducts food throughout the plant, it is the
system of narrow tubes that transports sugars and other
nutrients
Physical factors such as temperature and pH can alter enzyme
activity because they have an effect on the enzyme's
WITH CORRECT ANSWERS 2025
COMPLETE
,Which organelle is responsible for protein synthesis?
- ANSWER Ribosome
Why is yeast used to make bread rise?
- ANSWER Yeast carries out fermentation, producing
ethanol and carbon dioxide
How is mitosis different from meiosis?
- ANSWER Meiosis creates sex cells with half the # of
chromosomes of the parent cell where as mitosis creates
cells that are exact copies of each other, down to the
number of chromosomes
What can be altered?
- ANSWER DNA
What is single stranded?
- ANSWER RNA
, What contains uracil?
- ANSWER RNA
What codes for proteins?
- ANSWER DNA
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
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?
- ANSWER It will swell and probably burst/hypotonic
situation
What is the purpose of phloem tissue in plant stems?
- ANSWER It conducts food throughout the plant, it is the
system of narrow tubes that transports sugars and other
nutrients
Physical factors such as temperature and pH can alter enzyme
activity because they have an effect on the enzyme's
