BSC 108 EXAM 3 QUESTIONS AND
ANSWERS. VERIFIED 2025/2026.
What determines the nucleotide sequence of the newly synthesized starnd during DNA
replication? - ANS Base-pairing rules: A = T and C = G
In DNA from any species, the amount of adenine equals the amount of guanine, and the
amount of thymine equals the amount of cytosine. - ANS Fasle. Correct rule: A = T and C = G
What is anticodon part of? - ANS tRNA (transfer RNA)
The backbone of a DNA strand (a side of the ladder) consists of: - ANS Sugar (deoxyribose)
and phosphate groups
The three parts of a nucleotide are: - ANS 1. Sugar 2. Phosphate 3. Nitrogenous base
Which of these correctly illustrates the pairing of DNA and RNA nucleotides? - ANS DNA A =
RNA U, DNA T = RNA A, DNA C = RNA G, DNA G = RNA C
Mutations in sperm or eggas can be passed to the next generation. - ANS True
Transcription produces ___, while translation produces ___. - ANS mRNA; protein
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Transcription occurs in the cytoplasm. - ANS False
Complete the following: DNA, ___, Protein. - ANS DNA, RNA, Protein.
Describe the process of DNA replication. - ANS The DNA double helix unwinds, each strand
serves as a template, DNA polymerase adds complementary nucleotides, and two identical DNA
molecules form, each with one old strand and one new strand.
How does a virus differ from a cell? - ANS They cannot reproduce or carry out metabolism on
their own and must infect a host cell to replicate.
Describe the process of translation. - ANS Ribosomes read mRNA codons; tRNA brings amino
acids whose anticodon match the codons; the ribosome links amino acids together to form a
protein.
A vector is a DNA carrier that moves genes from one cell to another. - ANS True
The main purpose of PCR is to determine the sequence of a strand of DNA. - ANS False, PCR
amplifies (copies) DNA.
What are restriction enzymes used for? - ANS To cut DNA at specific sequences.
Attempts at treating human diseased with gene therapy have not yet been successful. -
ANS Fasle.
Transgenic plants: - ANS Plants the contain genes from other species.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
ANSWERS. VERIFIED 2025/2026.
What determines the nucleotide sequence of the newly synthesized starnd during DNA
replication? - ANS Base-pairing rules: A = T and C = G
In DNA from any species, the amount of adenine equals the amount of guanine, and the
amount of thymine equals the amount of cytosine. - ANS Fasle. Correct rule: A = T and C = G
What is anticodon part of? - ANS tRNA (transfer RNA)
The backbone of a DNA strand (a side of the ladder) consists of: - ANS Sugar (deoxyribose)
and phosphate groups
The three parts of a nucleotide are: - ANS 1. Sugar 2. Phosphate 3. Nitrogenous base
Which of these correctly illustrates the pairing of DNA and RNA nucleotides? - ANS DNA A =
RNA U, DNA T = RNA A, DNA C = RNA G, DNA G = RNA C
Mutations in sperm or eggas can be passed to the next generation. - ANS True
Transcription produces ___, while translation produces ___. - ANS mRNA; protein
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
, Transcription occurs in the cytoplasm. - ANS False
Complete the following: DNA, ___, Protein. - ANS DNA, RNA, Protein.
Describe the process of DNA replication. - ANS The DNA double helix unwinds, each strand
serves as a template, DNA polymerase adds complementary nucleotides, and two identical DNA
molecules form, each with one old strand and one new strand.
How does a virus differ from a cell? - ANS They cannot reproduce or carry out metabolism on
their own and must infect a host cell to replicate.
Describe the process of translation. - ANS Ribosomes read mRNA codons; tRNA brings amino
acids whose anticodon match the codons; the ribosome links amino acids together to form a
protein.
A vector is a DNA carrier that moves genes from one cell to another. - ANS True
The main purpose of PCR is to determine the sequence of a strand of DNA. - ANS False, PCR
amplifies (copies) DNA.
What are restriction enzymes used for? - ANS To cut DNA at specific sequences.
Attempts at treating human diseased with gene therapy have not yet been successful. -
ANS Fasle.
Transgenic plants: - ANS Plants the contain genes from other species.
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED.
