HESI Biology
Study online at https://quizlet.com/_essfm1
1. What is the hierarchic Kingdom
system of organization Phylum
in biology? Class
Order
Family
Genus
Species
2. What is considered the Evolution
core theme in biology Proposed by Darwin's "Origin of Species"
today?
3. What are the steps for Hypothesis
an experiment to be Experiment
performed? Gather Data
Make a conclusion
4. What is Specific Heat? The amount of heat necessary to raise the temper-
ature of 1 gram of a molecule by 1 degree Celsius.
5. What is water's Specif- Water has a high Specific Heat
ic Heat? Allows it to resist shifts in temp. allowing it to stabi-
lize climates.
6. What causes the phe- Water's polarity causes floating.
nomenon of floating If this did not occur, lakes would freeze from bottom
and why is it impor- up, making life impossible.
tant?
7. What are carbohy- Long chains, or polymers of sugars.
drates?
8. What are lipids? Fats, specifically: fatty acids, phospholipids,
steroids.
9. What are the cate- Vary greatly, but there are two categories: saturated
gories of fatty acids? and unsaturated.
10. What are saturated Contain no double bond in their carbon tail.
fats? Solid at room temperature.
, HESI Biology
Study online at https://quizlet.com/_essfm1
11. What are unsaturated Contain double bonds in their carbon tail.
fats? Liquid at room temperature.
12. What are Phospho- Consist of 2 fatty acids of varying length bonded to
lipids? a phosphate group.
Phosphate group is polar
Hydrocarbon tail is nonpolar.
13. Why are phospho- The phosphate group and hydrocarbon tail com-
lipids important? bine to create a barrier for cells.
14. What are steroids? Precursors to hormones, also part of cellular mem-
brane.
15. What are proteins? Most significant contributor to cellular function.
Polymers of amino acids.
16. What are enzymes? Catalysts to different chemical reactions and
processes.
Nearly all cellular function is catalyzed by an en-
zyme.
17. What are nucleic Components of DNA
acids?
18. What is Deoxyribonu- Molecule unique to each organism, contains info
cleic acid (DNA)? necessary for replication.
19. Ribonucleic acid? Used in transfer of genetic material and as a mes-
senger of DNA in most species of genetic code.
20. What is metabolism? Sum of all chemical reactions that occur in an or-
ganism.
21. What are metabolic The steps that it takes for a chemical reaction to
pathways? occur in a cell.
22. What are prokaryotic Cells with no nucleus and no organelles.
cells?
Study online at https://quizlet.com/_essfm1
1. What is the hierarchic Kingdom
system of organization Phylum
in biology? Class
Order
Family
Genus
Species
2. What is considered the Evolution
core theme in biology Proposed by Darwin's "Origin of Species"
today?
3. What are the steps for Hypothesis
an experiment to be Experiment
performed? Gather Data
Make a conclusion
4. What is Specific Heat? The amount of heat necessary to raise the temper-
ature of 1 gram of a molecule by 1 degree Celsius.
5. What is water's Specif- Water has a high Specific Heat
ic Heat? Allows it to resist shifts in temp. allowing it to stabi-
lize climates.
6. What causes the phe- Water's polarity causes floating.
nomenon of floating If this did not occur, lakes would freeze from bottom
and why is it impor- up, making life impossible.
tant?
7. What are carbohy- Long chains, or polymers of sugars.
drates?
8. What are lipids? Fats, specifically: fatty acids, phospholipids,
steroids.
9. What are the cate- Vary greatly, but there are two categories: saturated
gories of fatty acids? and unsaturated.
10. What are saturated Contain no double bond in their carbon tail.
fats? Solid at room temperature.
, HESI Biology
Study online at https://quizlet.com/_essfm1
11. What are unsaturated Contain double bonds in their carbon tail.
fats? Liquid at room temperature.
12. What are Phospho- Consist of 2 fatty acids of varying length bonded to
lipids? a phosphate group.
Phosphate group is polar
Hydrocarbon tail is nonpolar.
13. Why are phospho- The phosphate group and hydrocarbon tail com-
lipids important? bine to create a barrier for cells.
14. What are steroids? Precursors to hormones, also part of cellular mem-
brane.
15. What are proteins? Most significant contributor to cellular function.
Polymers of amino acids.
16. What are enzymes? Catalysts to different chemical reactions and
processes.
Nearly all cellular function is catalyzed by an en-
zyme.
17. What are nucleic Components of DNA
acids?
18. What is Deoxyribonu- Molecule unique to each organism, contains info
cleic acid (DNA)? necessary for replication.
19. Ribonucleic acid? Used in transfer of genetic material and as a mes-
senger of DNA in most species of genetic code.
20. What is metabolism? Sum of all chemical reactions that occur in an or-
ganism.
21. What are metabolic The steps that it takes for a chemical reaction to
pathways? occur in a cell.
22. What are prokaryotic Cells with no nucleus and no organelles.
cells?
