Comprehensive Biology: Cell Cycle,
DNA, Tissues, and Organ
Systems(Study Guide 2026/2027 -
Complete Questions with Verified
Correct Answers || 100% Guaranteed
Pass - Newest Version)
1.
Description: Tests the directional arrangement of DNA strands in the double helix.
Keywords: DNA, double helix, antiparallel, strands
Question: What is the orientation of DNA strands in a double helix?
A. Parallel, both 5′ to 3′
B. Anti-parallel, one 5′ to 3′ and the other 3′ to 5′ ✅✅✅
C. Parallel, both 3′ to 5′
D. Randomly arranged
2.
Description: Focuses on the structural unit of chromatin.
Keywords: nucleosome, histones, DNA packaging
Question: A nucleosome is best described as:
A. RNA wrapped around histones
B. DNA wrapped around a core of eight histone proteins ✅✅✅
C. Histone proteins surrounding a ribosome
D. Two DNA strands coiled without proteins
3.
Description: Assesses knowledge of DNA packaging proteins.
Keywords: histones, nucleosome, chromatin
Question: The protein core of a nucleosome is made up of:
A. 4 histone proteins
B. 6 histone proteins
,C. 8 histone proteins ✅✅✅
D. 10 histone proteins
4.
Description: Tests a key event of interphase.
Keywords: S phase, DNA synthesis, interphase
Question: What is the major event of the S phase of the cell cycle?
A. Cell division
B. DNA synthesis ✅✅✅
C. Cytokinesis
D. Protein secretion only
5.
Description: Integrates multiple events of S phase.
Keywords: sister chromatids, centrosomes, S phase
Question: Which combination occurs during S phase?
A. DNA synthesis, formation of sister chromatids, and duplication of centrosomes ✅✅✅
B. Chromosome separation and cytokinesis
C. Spindle disassembly and nuclear membrane formation
D. Only RNA transcription
6.
Description: Tests the outcome of DNA replication.
Keywords: semi-conservative replication, original strand, new strand
Question: Semi-conservative DNA replication produces daughter DNA molecules in which:
A. Both strands are newly synthesized
B. Both strands are parental
C. One strand is original and one is newly synthesized ✅✅✅
D. One molecule is all original and one is all new
7.
Description: Covers the significance of semi-conservative replication.
Keywords: DNA replication, template, heredity
Question: Why is DNA replication called semi-conservative?
A. Only half the chromosome is copied
B. One original strand is conserved in each new DNA molecule ✅✅✅
C. Only one daughter cell receives DNA
D. DNA is not copied completely
, 8.
Description: Tests mitotic chromosome behavior.
Keywords: anaphase, sister chromatids, mitosis
Question: What happens during Anaphase of mitosis?
A. Homologous chromosomes pair
B. Sister chromatids separate and move to opposite poles ✅✅✅
C. DNA replication occurs
D. Nucleoli reappear
9.
Description: Distinguishes phases of mitosis.
Keywords: mitosis, chromosome movement, spindle
Question: The movement of sister chromatids toward opposite poles is the defining feature of:
A. Prophase
B. Metaphase
C. Anaphase ✅✅✅
D. Telophase
10.
Description: Compares cytokinesis in two cell types.
Keywords: cytokinesis, animal cell, plant cell
Question: How does cytokinesis differ between animal and plant cells?
A. Animal cells form a cell plate; plant cells form a cleavage furrow
B. Animal cells form a cleavage furrow; plant cells form a cell plate ✅✅✅
C. Both form cleavage furrows
D. Both form cell plates
11.
Description: Focuses on plant cell division mechanics.
Keywords: plant cytokinesis, Golgi vesicles, cell plate
Question: In plant cells, the cell plate is formed mainly by:
A. Lysosomes
B. Mitochondria
C. Golgi vesicles ✅✅✅
D. Ribosomes
12.
DNA, Tissues, and Organ
Systems(Study Guide 2026/2027 -
Complete Questions with Verified
Correct Answers || 100% Guaranteed
Pass - Newest Version)
1.
Description: Tests the directional arrangement of DNA strands in the double helix.
Keywords: DNA, double helix, antiparallel, strands
Question: What is the orientation of DNA strands in a double helix?
A. Parallel, both 5′ to 3′
B. Anti-parallel, one 5′ to 3′ and the other 3′ to 5′ ✅✅✅
C. Parallel, both 3′ to 5′
D. Randomly arranged
2.
Description: Focuses on the structural unit of chromatin.
Keywords: nucleosome, histones, DNA packaging
Question: A nucleosome is best described as:
A. RNA wrapped around histones
B. DNA wrapped around a core of eight histone proteins ✅✅✅
C. Histone proteins surrounding a ribosome
D. Two DNA strands coiled without proteins
3.
Description: Assesses knowledge of DNA packaging proteins.
Keywords: histones, nucleosome, chromatin
Question: The protein core of a nucleosome is made up of:
A. 4 histone proteins
B. 6 histone proteins
,C. 8 histone proteins ✅✅✅
D. 10 histone proteins
4.
Description: Tests a key event of interphase.
Keywords: S phase, DNA synthesis, interphase
Question: What is the major event of the S phase of the cell cycle?
A. Cell division
B. DNA synthesis ✅✅✅
C. Cytokinesis
D. Protein secretion only
5.
Description: Integrates multiple events of S phase.
Keywords: sister chromatids, centrosomes, S phase
Question: Which combination occurs during S phase?
A. DNA synthesis, formation of sister chromatids, and duplication of centrosomes ✅✅✅
B. Chromosome separation and cytokinesis
C. Spindle disassembly and nuclear membrane formation
D. Only RNA transcription
6.
Description: Tests the outcome of DNA replication.
Keywords: semi-conservative replication, original strand, new strand
Question: Semi-conservative DNA replication produces daughter DNA molecules in which:
A. Both strands are newly synthesized
B. Both strands are parental
C. One strand is original and one is newly synthesized ✅✅✅
D. One molecule is all original and one is all new
7.
Description: Covers the significance of semi-conservative replication.
Keywords: DNA replication, template, heredity
Question: Why is DNA replication called semi-conservative?
A. Only half the chromosome is copied
B. One original strand is conserved in each new DNA molecule ✅✅✅
C. Only one daughter cell receives DNA
D. DNA is not copied completely
, 8.
Description: Tests mitotic chromosome behavior.
Keywords: anaphase, sister chromatids, mitosis
Question: What happens during Anaphase of mitosis?
A. Homologous chromosomes pair
B. Sister chromatids separate and move to opposite poles ✅✅✅
C. DNA replication occurs
D. Nucleoli reappear
9.
Description: Distinguishes phases of mitosis.
Keywords: mitosis, chromosome movement, spindle
Question: The movement of sister chromatids toward opposite poles is the defining feature of:
A. Prophase
B. Metaphase
C. Anaphase ✅✅✅
D. Telophase
10.
Description: Compares cytokinesis in two cell types.
Keywords: cytokinesis, animal cell, plant cell
Question: How does cytokinesis differ between animal and plant cells?
A. Animal cells form a cell plate; plant cells form a cleavage furrow
B. Animal cells form a cleavage furrow; plant cells form a cell plate ✅✅✅
C. Both form cleavage furrows
D. Both form cell plates
11.
Description: Focuses on plant cell division mechanics.
Keywords: plant cytokinesis, Golgi vesicles, cell plate
Question: In plant cells, the cell plate is formed mainly by:
A. Lysosomes
B. Mitochondria
C. Golgi vesicles ✅✅✅
D. Ribosomes
12.
