HESI A2 BIOLOGY
PRACTICE QUESTIONS
AND VERIFIED
ANSWERS
, HESI A2 BIOLOGY PRACTICE QUESTIONS AND VERIFIED
ANSWERS
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
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
Beeswax is an example of what kind of molecule? - - Answer --Lipid, waxes oils and fats are
lipids
Dogs are part of a larger animal group, the Carnivora. What classification is this? - - Answer --
Order
Foods with high salt content do not have to be refrigerated. What natural process prevents
these foods from spoiling? - - Answer --Osmosis
Hemophilia is a sex linked trait carried on the X chromosome. In an example of a male with
hemophilia and a female carrier, what ratio of the offspring is predicted to have the disease? - -
Answer --1 female: 0 male
How do green plants use nitrates in the nitrogen cycle? - - Answer --To synthesize proteins. A
nitrate is a nitrogen containing material found in soil. Green plants take in nitrates through their
roots and use them to make amino acids, the building blocks of proteins
How do RNA and DNA derive their names? - - Answer --From the sugar each contains
How does an enzyme work on a chemical reaction that occurs in a substrate? - - Answer --An
enzyme speeds up the chemical reaction, because enzymes are catalysts that speed up
reactions. They do this by lowering the amount of energy needed to begin the reaction.
How does yeast reproduce? - - Answer --Budding
How is mitosis different from meiosis? - - 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
How many pairs of homologous chromosomes do humans have? - - Answer --23 pairs for a
total of 46
If a disease is carried on the dominant allele, only the aa combination of recessive genes
represents a disease free offspring. - - Answer --1 out of 4 or 25% are predicted to be disease
free
If bacteria are placed in a strong solution of salt water, they will shrink as water moves out of the
bacteria. What is this process called? - - Answer --Osmosis, because if cells are placed in a
PRACTICE QUESTIONS
AND VERIFIED
ANSWERS
, HESI A2 BIOLOGY PRACTICE QUESTIONS AND VERIFIED
ANSWERS
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
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
Beeswax is an example of what kind of molecule? - - Answer --Lipid, waxes oils and fats are
lipids
Dogs are part of a larger animal group, the Carnivora. What classification is this? - - Answer --
Order
Foods with high salt content do not have to be refrigerated. What natural process prevents
these foods from spoiling? - - Answer --Osmosis
Hemophilia is a sex linked trait carried on the X chromosome. In an example of a male with
hemophilia and a female carrier, what ratio of the offspring is predicted to have the disease? - -
Answer --1 female: 0 male
How do green plants use nitrates in the nitrogen cycle? - - Answer --To synthesize proteins. A
nitrate is a nitrogen containing material found in soil. Green plants take in nitrates through their
roots and use them to make amino acids, the building blocks of proteins
How do RNA and DNA derive their names? - - Answer --From the sugar each contains
How does an enzyme work on a chemical reaction that occurs in a substrate? - - Answer --An
enzyme speeds up the chemical reaction, because enzymes are catalysts that speed up
reactions. They do this by lowering the amount of energy needed to begin the reaction.
How does yeast reproduce? - - Answer --Budding
How is mitosis different from meiosis? - - 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
How many pairs of homologous chromosomes do humans have? - - Answer --23 pairs for a
total of 46
If a disease is carried on the dominant allele, only the aa combination of recessive genes
represents a disease free offspring. - - Answer --1 out of 4 or 25% are predicted to be disease
free
If bacteria are placed in a strong solution of salt water, they will shrink as water moves out of the
bacteria. What is this process called? - - Answer --Osmosis, because if cells are placed in a
