3. Energy & Cell Processes

Organization of DNA in the Cell

Textbook Question
The centromere is a region at which .a. sister chromatids are attached to each other;b. metaphase chromosomes align;c. the tips of chromosomes are found;d. the nucleus is located
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Textbook Question
The following statements are about the control of chromatin condensation. Select True or False for each.T/F Reducing histone acetylase activity is likely to decrease gene transcription.T/F Mutations that reduce the number of positively charged amino acids on histones should promote open chromatin.T/F Chromatin remodeling complexes add chemical groups to histones.T/F Adding an inhibitor of DNA methylation is likely to reduce gene transcription.
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Textbook Question
The following statements are about the control of chromatin condensation. Select True or False for each.T/F Reducing histone acetylase activity is likely to decrease gene transcription.T/F Mutations that reduce the number of positively charged amino acids on histones should promote open chromatin.T/F Chromatin remodeling complexes add chemical groups to histones.T/F Adding an inhibitor of DNA methylation is likely to reduce gene transcription.
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Textbook Question
Sister chromatids .a. are two different chromosomes attached to each other;b. are exact copies of one chromosome that are attached to each other;c. arise from the centrioles;d. are broken down by mitosis;e. are chromosomes that carry different genes
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Textbook Question
Explain how and why chromatin is condensed in the nucleus.
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Textbook Question
Which of the following statements correctly describes the function of the nucleolus?
a. Within the nucleolus we find genes for rRNA.
b. Nucleoli manufacture mitochondrial proteins for export to the cytosol.
c. Nucleoli assemble the nuclear envelope.
d. The nucleolus contains the genes that form the Golgi apparatus.
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Textbook Question
Our somatic cell nuclei contain___pairs of chromosomes.
(a) 8
(b) 16
(c) 23
(d) 46
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