BIOS 251 Week 6 Quiz Exam 2 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which phase of mitosis involves chromosome condensation?
A. Metaphase
B. Prophase
C. Anaphase
D. Telophase
Correct answer: B
Rationale: During prophase, chromatin condenses into visible
chromosomes.
2. Which phase aligns chromosomes at the equatorial plate?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Correct answer: B
,Rationale: Metaphase ensures chromosomes line up for equal
separation.
3. Which phase separates sister chromatids?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Correct answer: C
Rationale: Anaphase pulls sister chromatids to opposite poles.
4. Which phase reforms the nuclear envelope?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Correct answer: D
Rationale: Telophase rebuilds nuclear membranes around
chromosomes.
5. Which structure attaches chromosomes to spindle fibers?
A. Centromere
B. Kinetochore
C. Chromatid
,D. Centrosome
Correct answer: B
Rationale: Kinetochores are protein structures where spindle fibers
attach.
6. Which phase of the cell cycle includes DNA replication?
A. G1
B. S
C. G2
D. M
Correct answer: B
Rationale: DNA is replicated during the S phase.
7. Which checkpoint ensures DNA is replicated before mitosis?
A. G1 checkpoint
B. S checkpoint
C. G2 checkpoint
D. M checkpoint
Correct answer: C
Rationale: G2 checkpoint verifies DNA replication completion.
8. Which structure organizes spindle fibers?
A. Ribosome
B. Centrosome
, C. Lysosome
D. Golgi apparatus
Correct answer: B
Rationale: Centrosomes organize microtubules during cell division.
9. Which type of RNA carries codons?
A. tRNA
B. rRNA
C. mRNA
D. snRNA
Correct answer: C
Rationale: mRNA carries genetic instructions from DNA.
10. Which molecule reads codons during translation?
A. DNA polymerase
B. tRNA
C. rRNA
D. Helicase
Correct answer: B
Rationale: tRNA matches anticodons with mRNA codons.
11. What is the function of ribosomes?
A. DNA replication
B. Protein synthesis
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which phase of mitosis involves chromosome condensation?
A. Metaphase
B. Prophase
C. Anaphase
D. Telophase
Correct answer: B
Rationale: During prophase, chromatin condenses into visible
chromosomes.
2. Which phase aligns chromosomes at the equatorial plate?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Correct answer: B
,Rationale: Metaphase ensures chromosomes line up for equal
separation.
3. Which phase separates sister chromatids?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Correct answer: C
Rationale: Anaphase pulls sister chromatids to opposite poles.
4. Which phase reforms the nuclear envelope?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase
Correct answer: D
Rationale: Telophase rebuilds nuclear membranes around
chromosomes.
5. Which structure attaches chromosomes to spindle fibers?
A. Centromere
B. Kinetochore
C. Chromatid
,D. Centrosome
Correct answer: B
Rationale: Kinetochores are protein structures where spindle fibers
attach.
6. Which phase of the cell cycle includes DNA replication?
A. G1
B. S
C. G2
D. M
Correct answer: B
Rationale: DNA is replicated during the S phase.
7. Which checkpoint ensures DNA is replicated before mitosis?
A. G1 checkpoint
B. S checkpoint
C. G2 checkpoint
D. M checkpoint
Correct answer: C
Rationale: G2 checkpoint verifies DNA replication completion.
8. Which structure organizes spindle fibers?
A. Ribosome
B. Centrosome
, C. Lysosome
D. Golgi apparatus
Correct answer: B
Rationale: Centrosomes organize microtubules during cell division.
9. Which type of RNA carries codons?
A. tRNA
B. rRNA
C. mRNA
D. snRNA
Correct answer: C
Rationale: mRNA carries genetic instructions from DNA.
10. Which molecule reads codons during translation?
A. DNA polymerase
B. tRNA
C. rRNA
D. Helicase
Correct answer: B
Rationale: tRNA matches anticodons with mRNA codons.
11. What is the function of ribosomes?
A. DNA replication
B. Protein synthesis
