Hesi A2 Biology Practice Questions.pdf file:///C:/Users/HP/Desktop/TYPA%20NEW/Hesi%20A2%20Biolo
HESI A2 Biology Practice Questions
1. Which organelle is responsible for protein synthesis?
ANS Ribosome
2. Why is yeast used to make bread rise?
ANS Yeast carries out fermentation, produc-ing ethanol and carbon dioxide
3. How is mitosis different from meiosis?
ANS 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
4. What can be altered?
ANS DNA
5. What is single stranded?
ANS RNA
6. What contains uracil?
ANS RNA
7. What codes for proteins?
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,Hesi A2 Biology Practice Questions.pdf file:///C:/Users/HP/Desktop/TYPA%20NEW/Hesi%20A2%20Biolo
ANS DNA
8. Imagine that two parents both carry the recessive gene for cystic fibro- sis. Any
homozygous recessive offspring will manifest the disease. What percentage of the
offspring is predicted to be carriers but not manifest thedisease?
ANS 50 percent
9. A cell is in a solution in which the concentration of solutes is higher insidethe cell than
outside the cell. What would you expect to happen to the cell?
ANS Itwill swell and probably burst/hypotonic situation
10. What is the purpose of phloem tissue in plant stems?
ANS It conducts food throughout the plant, it is the system of narrow tubes that transports
sugars andother nutrients
11. Physical factors such as temperature and pH can alter enzyme activity because they
have an effect on the enzyme's
ANS Shape, the shape of an enzymecontrols it's fit with its substrate.
12. Which part of a plants reproductive system is of a different gender thanothers?
ANS Stamen (male reproductive organ)
13. What kind of symbiosis exists between a pneumonia bacterium and ahuman?
ANS Parasitism, one organism benefits off another
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