HESI A2 CELL BIOLOGY CONCEPTS
:SCORE A+ 2025
1. The Molecule responsible for inheritance is _______ _.
DNA
Peptides
RNA
Protein
2. The relationship between DNA, RNA, and protein in living cells is often
summarized in this figure. The arrows indicate that:
Energy flows from DNA to protein, via an RNA intermediate.
Information is transferred from DNA into protein, via an RNA
intermediate.
DNA is chemically converted into RNA, and RNA is converted into
protein.
Cells evolved from using only DNA to store information, to later
forms that used RNA and protein.
3. Mitosis is needed for:
Replacement of tissues in organisms
Embryonic development
Wound healing
Maintenance of organ size and shape
All of the above and many more
,4. Which biological molecule is primarily responsible for muscle growth and
repair?
Carbohydrates
Fats
Proteins
Nucleic Acids
5. Explain the significance of the absence of a defined nucleus in prokaryotic
cells and how it affects their cellular processes.
It allows for faster reproduction and simpler cellular processes.
It leads to more complex metabolic pathways.
It enables the storage of genetic material in multiple locations.
It results in a higher energy requirement for cellular functions.
6. What are the building blocks of proteins?
Nucleotides
Fatty acids
Amino acids
Monosaccharides
7. Which is a lipid?
Fats
Steroids
Phospholipid
All of the above
8. The ability of water molecules to form intermolecular hydrogen bonds:
gives water a high specific heat.
, causes water to have a high surface tension.
makes water a universal solvent for many polar molecules.
all of the above.
9. What is the primary function of the cell membrane in a biological cell?
To synthesize proteins
To provide structural support
To facilitate communication and regulate substance passage
To store genetic information
10. In this picture the attraction between the negative Oxygen atom of one
water molecule and the positive Hydrogen atom of another water
molecule can be seen. This is called:
An ionic bond
A polar bond
A non-polar bond
A hydrogen bond
11. If a specific enzyme in a metabolic pathway is inhibited, what is the most
likely outcome for the pathway's overall function?
:SCORE A+ 2025
1. The Molecule responsible for inheritance is _______ _.
DNA
Peptides
RNA
Protein
2. The relationship between DNA, RNA, and protein in living cells is often
summarized in this figure. The arrows indicate that:
Energy flows from DNA to protein, via an RNA intermediate.
Information is transferred from DNA into protein, via an RNA
intermediate.
DNA is chemically converted into RNA, and RNA is converted into
protein.
Cells evolved from using only DNA to store information, to later
forms that used RNA and protein.
3. Mitosis is needed for:
Replacement of tissues in organisms
Embryonic development
Wound healing
Maintenance of organ size and shape
All of the above and many more
,4. Which biological molecule is primarily responsible for muscle growth and
repair?
Carbohydrates
Fats
Proteins
Nucleic Acids
5. Explain the significance of the absence of a defined nucleus in prokaryotic
cells and how it affects their cellular processes.
It allows for faster reproduction and simpler cellular processes.
It leads to more complex metabolic pathways.
It enables the storage of genetic material in multiple locations.
It results in a higher energy requirement for cellular functions.
6. What are the building blocks of proteins?
Nucleotides
Fatty acids
Amino acids
Monosaccharides
7. Which is a lipid?
Fats
Steroids
Phospholipid
All of the above
8. The ability of water molecules to form intermolecular hydrogen bonds:
gives water a high specific heat.
, causes water to have a high surface tension.
makes water a universal solvent for many polar molecules.
all of the above.
9. What is the primary function of the cell membrane in a biological cell?
To synthesize proteins
To provide structural support
To facilitate communication and regulate substance passage
To store genetic information
10. In this picture the attraction between the negative Oxygen atom of one
water molecule and the positive Hydrogen atom of another water
molecule can be seen. This is called:
An ionic bond
A polar bond
A non-polar bond
A hydrogen bond
11. If a specific enzyme in a metabolic pathway is inhibited, what is the most
likely outcome for the pathway's overall function?
