BIO 170
Midterm 1
Comprehensive
Questions with
Verified
Answers
Graded A+
1. Base pairs in DNA Answer: G (guanine) pairs
with C (cytosine) A (adenine) pairs with T (thymine)
**uracil replace thymine in RNA, pair becomes A and U
2. Small ions can pass freely through the phospholipid bilayer Answer:
false, they require protein channels or carriers
3. During which process do cells reproduce to form two identical
1/
11
, daughter cells? Answer: mitosis
4. active site of an enzyme Answer: the region where the substrate binds and the
reaction occurs.
5. four most common elements in living organisms Answer: hydrogen,
carbon, oxygen, nitrogen
6. What was the outcome of the nutrient broth in Pasteur's swan-
neck flask when it was not exposed to pre-existing cells? Answer: the broth
remained sterile, supporting the idea that cells do not arise spontaneously.
7. The Theory of Evolution, primarily through natural selection,
explains Answer: how species change over time and how new species arise from
common ancestors.
8. What is the common structural feature of all amino acids? Answer:
Carboxyl group and amino group
9. Uracil is a nucleotide found in DNA. Answer: false
10. What is the relationship between humans and modern apes
according to evolutionary theory? Answer: Humans and modern apes share a
common ancestor
11. Dehydration reactions Answer: build nucleic acids by joining nucleotides
12. Hydrolysis Answer: the process of adding water to break a peptide bond.
13. In DNA, what kind of bond holds the two strands together?
Answer: Hydrogen bond
14. What is the definition of a molecule? Answer: Two or more atoms
bonded together
15. What is the primary difference between exothermic and
2/
11
Midterm 1
Comprehensive
Questions with
Verified
Answers
Graded A+
1. Base pairs in DNA Answer: G (guanine) pairs
with C (cytosine) A (adenine) pairs with T (thymine)
**uracil replace thymine in RNA, pair becomes A and U
2. Small ions can pass freely through the phospholipid bilayer Answer:
false, they require protein channels or carriers
3. During which process do cells reproduce to form two identical
1/
11
, daughter cells? Answer: mitosis
4. active site of an enzyme Answer: the region where the substrate binds and the
reaction occurs.
5. four most common elements in living organisms Answer: hydrogen,
carbon, oxygen, nitrogen
6. What was the outcome of the nutrient broth in Pasteur's swan-
neck flask when it was not exposed to pre-existing cells? Answer: the broth
remained sterile, supporting the idea that cells do not arise spontaneously.
7. The Theory of Evolution, primarily through natural selection,
explains Answer: how species change over time and how new species arise from
common ancestors.
8. What is the common structural feature of all amino acids? Answer:
Carboxyl group and amino group
9. Uracil is a nucleotide found in DNA. Answer: false
10. What is the relationship between humans and modern apes
according to evolutionary theory? Answer: Humans and modern apes share a
common ancestor
11. Dehydration reactions Answer: build nucleic acids by joining nucleotides
12. Hydrolysis Answer: the process of adding water to break a peptide bond.
13. In DNA, what kind of bond holds the two strands together?
Answer: Hydrogen bond
14. What is the definition of a molecule? Answer: Two or more atoms
bonded together
15. What is the primary difference between exothermic and
2/
11
