Biology A Unit 4: Lessons 15-21 Fall 2023 Questions and
Answers
Lesson 15:
Lesson 15:
Cells spend most of their time in which phase of the cell cycle?
interphase
Study the diagram.
https://cdstools.flipswitch.com/asset/media/1156588
What two phases of the cell cycle include cell growth?
G1 and G2
What are the locations in the cell cycle where proteins can initiate or stop the
next phase of the cycle called?
checkpoints
In one phase of the cell cycle, the cells are no longer dividing. What is this phase
called?
G0
What is the repeated series of steps that involve cellular growth and division
called?
cell cycle
A checkpoint protein may activate a preprogrammed self-destruct sequence in a
cell's DNA code if DNA damage is detected.
What term correctly describes this process?
apoptosis
According to this diagram, in which phase of the cell cycle do cells spend the
most time?
https://cdstools.flipswitch.com/asset/media/1156589
interphase
What statements are true about the metaphase checkpoint?
Select all that apply.
If the metaphase checkpoint were not in place, cells could receive too many or too few
chromosomes.
The metaphase checkpoint occurs during mitosis.
What is a characteristic of cells in the G0 phase?
lack of cell division
Which components of the cell cycle represent interphase?
G1, S, and G2
In which stage does the duplication of DNA occur?
S
, Lesson 16:
Lesson 16:
What is a chromosome?
a structure found in cells that contains DNA
Which type of protein does eukaryotic DNA wrap around to form chromosomes?
histone proteins
Which is a characteristic of a diploid cell?
It has two sets of chromosomes.
What is the term for chromosomes that are similar in size and shape and that
contain variations of the same genes?
homologous chromosomes
What are genes?
sections of DNA that control traits by encoding specific proteins
What is the structure of prokaryotic chromosomes?
circular DNA with no histones
Which correctly describes the role of histones in eukaryotic cell division?
Histones keep the DNA compact and organized.
A structure has these features:
It is inside a prokaryotic cell.
It's a very small circular DNA fragment.
It is separate from an organism's actual chromosomes.
What structure is this?
plasmid
Study the image.
https://cdstools.flipswitch.com/asset/media/1156627
Which best describes the image?
XXX WRONG XXX
chromatin in a nondividing cell
If the haploid number of an organism is 32, how many pairs of chromosomes
would be found in each of the cells of the adult organism?
32
What is the term for chromosomes that do not serve a function in determining the
sex of an individual?
autosomes
Which statements are true about sex chromosomes?
Select all that apply.
They are not numbered in a karyotype.
They determine the sex of an organism.
Which of these statements accurately describes a karyotype?
Answers
Lesson 15:
Lesson 15:
Cells spend most of their time in which phase of the cell cycle?
interphase
Study the diagram.
https://cdstools.flipswitch.com/asset/media/1156588
What two phases of the cell cycle include cell growth?
G1 and G2
What are the locations in the cell cycle where proteins can initiate or stop the
next phase of the cycle called?
checkpoints
In one phase of the cell cycle, the cells are no longer dividing. What is this phase
called?
G0
What is the repeated series of steps that involve cellular growth and division
called?
cell cycle
A checkpoint protein may activate a preprogrammed self-destruct sequence in a
cell's DNA code if DNA damage is detected.
What term correctly describes this process?
apoptosis
According to this diagram, in which phase of the cell cycle do cells spend the
most time?
https://cdstools.flipswitch.com/asset/media/1156589
interphase
What statements are true about the metaphase checkpoint?
Select all that apply.
If the metaphase checkpoint were not in place, cells could receive too many or too few
chromosomes.
The metaphase checkpoint occurs during mitosis.
What is a characteristic of cells in the G0 phase?
lack of cell division
Which components of the cell cycle represent interphase?
G1, S, and G2
In which stage does the duplication of DNA occur?
S
, Lesson 16:
Lesson 16:
What is a chromosome?
a structure found in cells that contains DNA
Which type of protein does eukaryotic DNA wrap around to form chromosomes?
histone proteins
Which is a characteristic of a diploid cell?
It has two sets of chromosomes.
What is the term for chromosomes that are similar in size and shape and that
contain variations of the same genes?
homologous chromosomes
What are genes?
sections of DNA that control traits by encoding specific proteins
What is the structure of prokaryotic chromosomes?
circular DNA with no histones
Which correctly describes the role of histones in eukaryotic cell division?
Histones keep the DNA compact and organized.
A structure has these features:
It is inside a prokaryotic cell.
It's a very small circular DNA fragment.
It is separate from an organism's actual chromosomes.
What structure is this?
plasmid
Study the image.
https://cdstools.flipswitch.com/asset/media/1156627
Which best describes the image?
XXX WRONG XXX
chromatin in a nondividing cell
If the haploid number of an organism is 32, how many pairs of chromosomes
would be found in each of the cells of the adult organism?
32
What is the term for chromosomes that do not serve a function in determining the
sex of an individual?
autosomes
Which statements are true about sex chromosomes?
Select all that apply.
They are not numbered in a karyotype.
They determine the sex of an organism.
Which of these statements accurately describes a karyotype?
