WorksheetsMixed review quiz Prep
Total questions: 24
Worksheet time: 12mins
Name
Class
Date
1.
A multicellular organism needs to replace damaged skin cells. Which process is responsible for this repair?
a)
Meiosis
b)
Fertilization
c)
Mitosis
d)
Osmosis
2.
During which part of the cell cycle is the cell's DNA replicated?
a)
G1
b)
S
c)
G2
d)
cytokinesis
3.
In which phase of mitosis do the chromosomes align in the center of the cell?
a)
prophase
b)
metaphase
c)
anaphase
d)
telophase
4.
What is the name of the structure that holds two sister chromatids together?
a)
Centriole
b)
Spindle fiber
c)
Centromere
d)
Nuclear envelope
5.
Which statement best describes the daughter cells produced by mitosis?
a)
They are genetically identical to the parent cell.
b)
They have half the number of chromosomes as the parent cell.
c)
They are genetically unique and different from each other.
d)
they contain only the dominant genes of the parent.
6.
If a human somatic (body) cell has 46 chromosomes, how many chromosomes will each daughter cell have after mitosis?
a)
23
b)
46
c)
92
d)
12
7.
Uncontrolled cell growth and division, often caused by mutations in DNA, is known as:
a)
Differentiation
b)
Photosynthesis
c)
Cancer
d)
Apoptosis
8.
In plant cells, what structure forms during cytokinesis to divide the cytoplasm into two?
a)
Cleavage furrow
b)
Cell plate
c)
Spindle apparatus
d)
Centrosome
9.
A cell spends most of its life cycle in which of the following stages?
a)
interphase
b)
prophase
c)
metaphase
d)
telophase
10.
A student is looking at a root tip cell under a microscope and observes sister chromatids being pulled apart to opposite poles of the cell. Which phase is being observed?
a)
prophase
b)
metaphase
c)
anaphase
d)
telophase
11.
What would most likely happen if a cell's DNA did not replicate during the S phase of interphase?
a)
The daughter cells would have the correct number of chromosomes.
b)
The cell would skip mitosis and go straight to cytokinesis.
c)
The daughter cells would each have only half of the required genetic information
d)
The cell would divide twice to make up for the missing DNA.
12.
Substances like tobacco smoke and UV radiation are known to cause mutations that can lead to cancer. These substances are called:
a)
Catalysts
b)
Enzymes
c)
Carcinogens
d)
Hormones
13.
How does the process of cell differentiation relate to mitosis in a developing multicellular organism?
a)
Mitosis creates different types of DNA for different types of cells.
b)
Mitosis produces identical cells, which then express different genes to become specialized.
c)
Differentiation occurs first, and then mitosis creates the specialized cells
d)
Mitosis only occurs in stem cells, while differentiation only occurs in adult cells.
14.
A researcher is studying a cell and notices a high concentration of ribosomes. Which function is this cell most likely specialized to perform?
a)
Storing genetic information
b)
Generating ATP through cellular respiration
c)
Synthesizing proteins for export
d)
Transporting lipids across the membrane
15.
If a cell is placed in a high-salt solution (hypertonic), what will most likely happen to the cell?
a)
Water will enter the cell, causing it to swell and burst.
b)
Water will leave the cell, causing it to shrink.
c)
Salt will move into the cell until equilibrium is reached.
d)
The cell will remain the same size because of the cell wall.
16.
Enzymes act as biological catalysts by:
a)
Increasing the temperature of a reaction.
b)
Being consumed during the chemical reaction.
c)
Lowering the activation energy required for a reaction.
d)
Raising the pH of the cellular environment.
17.
A segment of DNA has the sequence ATA-GCA-CAT. What would be the corresponding mRNA sequence produced during transcription?
a)
TAT-CGT-GTA
b)
UAU-CGU-GUA
c)
ATA-GCA-CAT
d)
UTU-GCT-GUT
18.
In pea plants, purple flowers (P) are dominant over white flowers (p). If two heterozygous (Pp) plants are crossed, what is the expected phenotypic ratio of the offspring?
a)
100% purple
b)
50% purple, 50% white
c)
75% purple, 25% white
d)
25% purple, 75% white
19.
A mutation occurs where one nucleotide is deleted from a DNA sequence. This is known as a:
a)
Silent mutation
b)
Frameshift mutation
c)
Substitution mutation
d)
Nondisjunction
20.
Which of the following is the best evidence that two different species share a common ancestor?
a)
They live in the same ecosystem.
b)
They have similar dietary requirements.
c)
They share highly similar DNA sequences.
d)
They both have the ability to fly.
21.
In a population of beetles, a few individuals with a rare green color move into a population of brown beetles. This is an example of:
a)
Gene flow
b)
Genetic drift
c)
Natural selection
d)
Speciation
22.
Under which condition is a population most likely to undergo rapid speciation?
a)
A large population with a stable environment.
b)
Geographic isolation of a small sub-population.
c)
A high rate of gene flow between populations.
d)
A lack of competition for resources.
23.
If a disease kills off most of the primary consumers in an ecosystem, what is the most likely immediate effect on the producers?
a)
The producer population will decrease.
b)
The producer population will increase.
c)
The producers will evolve into consumers.
d)
There will be no effect on the producers.
24.
Which process removes carbon dioxide from the atmosphere?
a)
Combustion
b)
Cellular respiration
c)
Photosynthesis
d)
Decomposition
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