Are You Ready To Take A Quick Biology Exam! Quiz
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Are you ready to take a quick biology exam? Biology is the natural science that studies life and living organisms, including their physical development and evolution. Even though biology is a complex field, there are unifying concepts that explain the life and death cycle in a less intrusive way. If you would like to discover further about biology, complete this quiz.
Questions and Answers
- 1.
Which of the following statements is true?
- A.
Bacteria has visible mitotic spindles and microtubules
- B.
Bacteria has nuclear envelope
- C.
Bacteria's most genes are carried on a single bacterial chromosome
- D.
Eukaryotes evolved before prokaryotes
Correct Answer
C. Bacteria's most genes are carried on a single bacterial chromosomeExplanation
Bacteria's most genes are carried on a single bacterial chromosome. Bacteria typically have a single circular chromosome that contains the majority of their genetic information. This chromosome is not enclosed within a nuclear envelope, as bacteria do not have a nucleus. Bacteria do not have visible mitotic spindles and microtubules, as these structures are typically found in eukaryotic cells during cell division. The statement that eukaryotes evolved before prokaryotes is incorrect, as prokaryotes are believed to have evolved before eukaryotes.Rate this question:
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- 2.
At which phase do two daughter nuclei form?
- A.
Metaphase
- B.
Telophase
- C.
Anaphase
- D.
Prophase
Correct Answer
B. TelopHaseExplanation
During telophase, the final stage of mitosis, the two daughter nuclei form. This phase follows the separation of the sister chromatids in anaphase and the movement of the chromosomes to opposite poles of the cell. In telophase, the nuclear envelope reforms around each set of chromosomes, creating two distinct nuclei. This marks the end of cell division and the beginning of cytokinesis, where the cell physically divides into two daughter cells.Rate this question:
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- 3.
Longest phase in mitosis is
- A.
Prophase
- B.
Prometaphase
- C.
Metaphase
- D.
Telophase
Correct Answer
C. MetapHaseExplanation
Metaphase is the correct answer because it is the longest phase in mitosis. During metaphase, the chromosomes align themselves at the center of the cell, forming a single line called the metaphase plate. This alignment ensures that each daughter cell receives the correct number of chromosomes during cell division. The chromosomes are fully condensed and attached to spindle fibers, preparing for their separation in the subsequent phase of mitosis. The process of aligning the chromosomes in metaphase is crucial for the accurate distribution of genetic material to the daughter cells.Rate this question:
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- 4.
A cell entering the cell cycle with 8 chromosomes will produce two daughter cells each with
- A.
16 chromosomes
- B.
4 chromosomes
- C.
8 chromosomes
- D.
8 pairs of chromosomes
Correct Answer
C. 8 chromosomesExplanation
When a cell enters the cell cycle with 8 chromosomes, it undergoes DNA replication during the S phase. This results in the duplication of each chromosome, so that by the end of replication, the cell has 16 chromosomes. During cell division (mitosis), these duplicated chromosomes are separated equally into two daughter cells. Therefore, each daughter cell will receive 8 chromosomes, which is the same as the number of chromosomes in the original cell entering the cell cycle.Rate this question:
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- 5.
One of the following is wrong about spindles
- A.
Include asterÂ
- B.
Include spindle microtubules
- C.
Include centromere
- D.
Include centrosomesÂ
Correct Answer
C. Include centromereExplanation
The correct answer is "Include centromere." This is because centromeres are not directly associated with spindles. Spindles are composed of spindle microtubules, which are responsible for separating chromosomes during cell division. Centromeres, on the other hand, are specific regions on chromosomes where the spindle fibers attach during cell division. Therefore, including centromere in the list of components of spindles would be incorrect.Rate this question:
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- 6.
During which phase in the cell does mitosis happen?
- A.
G1 phase
- B.
G2 phase
- C.
M phase
- D.
S phase
Correct Answer
C. M pHaseExplanation
Mitosis occurs during the M phase of the cell cycle. The M phase is the phase where cell division takes place and is divided into two main stages: mitosis and cytokinesis. Mitosis is the process of nuclear division, where the replicated DNA is evenly distributed into two daughter cells. This is followed by cytokinesis, which is the division of the cytoplasm and the formation of two separate daughter cells. Therefore, the correct answer is M phase.Rate this question:
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- 7.
The process converted the normal cell to a cancerous cell
- A.
Metastasize
- B.
Transformation
- C.
Benign tumor
- D.
Malignant tumor
Correct Answer
B. TransformationExplanation
The term "transformation" refers to the process in which a normal cell undergoes genetic changes that cause it to become a cancerous cell. This process involves the cell acquiring mutations that disrupt its normal growth and division, leading to uncontrolled proliferation. In contrast, "metastasize" refers to the spread of cancer cells from the primary tumor to other parts of the body. "Benign tumor" refers to a non-cancerous growth that does not invade nearby tissues or spread, while a "malignant tumor" is cancerous and has the potential to invade surrounding tissues and metastasize. Therefore, the process described in the question is best described as "transformation."Rate this question:
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- 8.
Which of the following human cells doesn't divide?
- A.
Liver cell
- B.
Cancer cell
- C.
Skin cell
- D.
Nerve cell
Correct Answer
D. Nerve cellExplanation
Nerve cells, also known as neurons, are the correct answer because they have a limited ability to divide or regenerate. Unlike other cells in the body, nerve cells do not undergo frequent cell division. Once they are damaged or die, they are not easily replaced, which is why nerve injuries or diseases can have long-lasting effects. This is in contrast to liver cells, skin cells, and even cancer cells, which can divide and replicate under certain conditions.Rate this question:
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- 9.
How many chromosomes are there in chimpanzees?
- A.
18
- B.
56
- C.
48
- D.
90
Correct Answer
C. 48Explanation
Chimpanzees have 48 chromosomes. Chromosomes are structures found in the nucleus of cells that contain genetic material. They carry the genes that determine an organism's traits. Chimpanzees, like humans, are classified as primates and share a close evolutionary relationship with us. Both humans and chimpanzees have 48 chromosomes, arranged in 24 pairs. This similarity in chromosome number is one of the reasons why chimpanzees are often used as a model organism in scientific studies to better understand human biology and genetics.Rate this question:
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- 10.
CDK's are
- A.
RNA
- B.
Lipids
- C.
Enzymes
- D.
DNA
Correct Answer
C. EnzymesExplanation
CDK's, or cyclin-dependent kinases, are enzymes. Enzymes are proteins that act as catalysts in biochemical reactions, facilitating the conversion of substrates into products. CDK's specifically play a crucial role in cell cycle regulation, controlling the progression from one phase to another. They work in conjunction with cyclins, which bind to CDK's, activating their enzymatic activity. Together, CDK's and cyclins regulate the timing and coordination of cell division. Therefore, the correct answer is enzymes.Rate this question:
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- 11.
Cell cycle chromosomes are visible during
- A.
Interphase
- B.
G1 phase
- C.
Cell division
- D.
When they are being replicated
Correct Answer
C. Cell divisionExplanation
During cell division, chromosomes are visible because this is the phase when they condense and become tightly coiled. This allows for easier segregation of genetic material into daughter cells. In contrast, during interphase and the G1 phase, chromosomes are in a less condensed state and are not easily visible under a microscope. Replication of chromosomes occurs during the S phase of interphase, but they are not fully condensed and visible until cell division.Rate this question:
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- 12.
If a human somatic cell is just about to divide, it has
- A.
46 chromosomes
- B.
23 chromosomes
- C.
36 chromosomes
- D.
92 chromosomes
Correct Answer
D. 92 chromosomesExplanation
A human somatic cell is a diploid cell, which means it contains two sets of chromosomes. In humans, the diploid number of chromosomes is 46. Therefore, if a human somatic cell is just about to divide, it will have 92 chromosomes, as each chromosome duplicates itself before cell division occurs.Rate this question:
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- 13.
A human cell undergo one division in
- A.
24 hours
- B.
48 hours
- C.
12 hours
- D.
28 hours
Correct Answer
A. 24 hoursExplanation
A human cell undergoes one division in 24 hours. This is because the cell cycle, which includes the stages of growth, DNA replication, and cell division, typically takes around 24 hours to complete in human cells. During this time, the cell undergoes various processes to ensure accurate replication and division, allowing for the growth and maintenance of tissues and organs in the human body.Rate this question:
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- 14.
One of the following disappears in prophase
- A.
Chromosomes
- B.
Asters
- C.
Nucleoli
- D.
Centriols
Correct Answer
C. NucleoliExplanation
During prophase, the nucleoli, which are responsible for the production of ribosomes, disappear. This is because prophase is the first stage of mitosis, where the cell prepares for division. The disappearance of nucleoli is necessary for the cell to reorganize its genetic material, condense the chromosomes, and form the mitotic spindle. Therefore, the correct answer is nucleoli.Rate this question:
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- 15.
Cell division in unicellular eukaryotes is for
- A.
Repair
- B.
Growth
- C.
Reproduction
- D.
All of the above
Correct Answer
C. ReproductionExplanation
Cell division in unicellular eukaryotes is primarily for reproduction. Unicellular eukaryotes, such as yeast or amoeba, reproduce by a process called binary fission, where a single cell divides into two identical daughter cells. This allows them to multiply and increase their population. Repair and growth are also important functions of cell division, but in the context of unicellular eukaryotes, reproduction is the main purpose of cell division.Rate this question:
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- 16.
Which of the following cells divides frequently throughout human life?
- A.
Liver cells
- B.
Muscle cells
- C.
Nerve cells
- D.
Skin cells
Correct Answer
D. Skin cellsExplanation
Skin cells divide frequently throughout human life. The epidermis, which is the outermost layer of the skin, constantly undergoes cell division to replace old and damaged cells. This process helps in maintaining the integrity and functionality of the skin. The frequent division of skin cells also allows for wound healing and regeneration. In contrast, liver cells, muscle cells, and nerve cells have limited or no ability to divide and regenerate, making skin cells the correct answer.Rate this question:
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Mar 21, 2023Quiz Edited by
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May 01, 2020Quiz Created by
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