1.If scientists could increase telomerase production in specific cells, the primary reason for this would most likely be the stopping of
A. meiosis.
B. aerobic respiration.
C. cancer cell formation.
D. All of the answer choices are correct.
E. aging of cells.
2. When DNA replicates
A. the original DNA unwinds, and multiple copies of a region are transcribed before the DNA closes back up.
B. transcription factors determine where to begin DNA replication.
C. None of the answer choices are correct.
D.one strand of the original DNA ends up in each of the new DNA molecules.
E. the original DNA is not affected and a new double-stranded DNA is made from two new strands of DNA.
3. In the biology lab, you observe three different animal cells under a microscope. In one cell, the nucleus is uniformly filled, with no distinct chromosome structure visible. In another, you see the nucleus with two nucleolus areas of more compact chromatin. A third cell is in mitosis, and distinct chromosome strands are visible. The value in packaging DNA in tighter forms of chromatin is for
A. mobility and protection of the DNA molecule during mitosis.
B. prevention of ligase enzyme action during replication.
C. Both answers regarding DNA mobility, protection and regulation in mitosis and transcription are correct.
D. regulation and protection of the DNA during transcription.
E.insuring that sister chromatids will be attached prior to replication.
.
1.If scientists could increase telomerase production in specific cells, the primary reason for this would most likely be the stopping of
A. meiosis.
B. aerobic respiration.
C. cancer cell formation.
D. All of the answer choices are correct.
E. aging of cells.
2. When DNA replicates
A. the original DNA unwinds, and multiple copies of a region are transcribed before the DNA closes back up.
B. transcription factors determine where to begin DNA replication.
C. None of the answer choices are correct.
D.one strand of the original DNA ends up in each of the new DNA molecules.
E. the original DNA is not affected and a new double-stranded DNA is made from two new strands of DNA.
3. In the biology lab, you observe three different animal cells under a microscope. In one cell, the nucleus is uniformly filled, with no distinct chromosome structure visible. In another, you see the nucleus with two nucleolus areas of more compact chromatin. A third cell is in mitosis, and distinct chromosome strands are visible. The value in packaging DNA in tighter forms of chromatin is for
A. mobility and protection of the DNA molecule during mitosis.
B. prevention of ligase enzyme action during replication.
C. Both answers regarding DNA mobility, protection and regulation in mitosis and transcription are correct.
D. regulation and protection of the DNA during transcription.
E.insuring that sister chromatids will be attached prior to replication.
.
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Related questions
What is the difference between chromatin and chromosomes?
Question options:
chromatin is one of two identical strands of DNA. | |
chromosomes are chromatin that has been tightly packed and coiled. | |
chromosomes are composed of nucleosomes and chromatin is composed of sister chromatids. | |
chromosomes are important in mitosis and chromatin is essential to meiosis. |
Bacterial cells only reproduce asexually and cannot exchange genetic material.
Question options:
True, because they undergo binary fission. | |
False, because they transfer genetic material with other bacterial cells. | |
True, because they have a cell wall that prevents sharing of genetic material. |
After a visit to a specialist, Dan was diagnosed with liver cancer. Six months later additional tumors were found in his stomach and small intestine. This is an example of
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malignant tumors. | |
benign tumors. | |
Both malignant tumors and metastasis are correct. |
Which of the following does NOT occur during mitosis?
Question options:
DNA is replicated. | |
Replicated chromosomes divide. | |
Cells line up along the equator of the cell. |
Which of the following is INCORRECTLY matched?
Question options:
prophase -- mitotic spindle forms | |
metaphase -- chromosomes line up along the equator | |
telophase -- cytoplasm divides |
Why is hair loss a common side effect of cancer treatments?
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Hair cells are at the surface of the body so die easily. | |||||||
Hair cells divide rapidly and so are targeted by the cancer drugs. | |||||||
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