Pearson Etext Becker's World Of The Cell -- Access Format: Access Code Card
9th Edition
ISBN: 9780134873664
Author: Hardin, Jeff^bertoni, Gregory Paul^kleinsmith, Lew
Publisher: Prentice Hall
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Chapter 16, Problem 16.7PS
Nuclear Structure and Function. Indicate the implications for nuclear structure or function of each of the following experimental observations.
- (a) Sucrose crosses the nuclear envelope so rapidly that its rate of movement cannot be accurately measured.
- (b) Colloidal gold particles with a diameter of 5.5 nm equilibrate rapidly between the nucleus and cytosol when injected into an amoeba, but gold particles with a diameter of 15 nm do not.
- (c) Nuclear pore complexes sometimes stain heavily for RNA and protein.
- (d) If gold particles up to 26 nm in diameter are coated with a polypeptide containing a nuclear localization signal (NLS) and are then injected into the cytosol of a living cell, they are transported into the nucleus. If they are injected into the nucleus, however, they remain there.
- (e) Many of the proteins of the nuclear envelope appear from electrophoretic analysis to be the same as those found in the endoplasmic reticulum.
- (f) Ribosomal proteins are synthesized in the cytosol but are packaged with rRNA into ribosomal subunits in the nucleus.
- (g) Treatment of nuclei with the nonionic detergent Triton X-100 dissolves the nuclear envelope but leaves an otherwise intact nucleus.
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Chapter 2: CARBOHYDRATES
SELF-ASSESSMENT EXERCISES
I. Essay questions
1. Define and classify carbohydrates with suitable examples. Add a note on the functions of
carbohydrates.
2. Describe the structure and functions of mucopolysaccharides.
3. Give an account of the structural configuration of monosaccharides, with special reference to
glucose.
4. Discuss the structure and functions of 3 biochemically important disaccharides.
5. Define polysaccharides and describe the structure of 3 homopolysaccharides.
III. Fill…
multiple choice question :
The structure of silk fibroin is dominated by
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Chapter 16 Solutions
Pearson Etext Becker's World Of The Cell -- Access Format: Access Code Card
Ch. 16 - Based on what you know about protein and DNA, why...Ch. 16 - The GC content of the DNA from a newly discovered...Ch. 16 - Prob. 1QCh. 16 - Changes in chromatin packing correlate with...Ch. 16 - You are studying a cytosolic protein, and your...Ch. 16 - Prior Knowledge. Virtually every experiment...Ch. 16 - DNA Base Composition. Based on your understanding...Ch. 16 - DNA Structure. Carefully inspect the...Ch. 16 - QUANTITATIVE DNA Melting. Figure 16-36 shows the...Ch. 16 - DNA Renaturation. You are given two samples of...
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