Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 18, Problem 18.13PS
Nucleoli. Indicate whether each of the following statements is true (T) or false (F). If false, reword the statement to make it true.
(a) Nucleoli are membrane-bounded structures present in the eukaryotic nucleus.
(b) The fibrils seen in electron micrographs of nucleoli contain DNA and RNA.
(c) The DNA of nucleoli carries the cell’s tRNA genes, which are present in clusters of multiple copies.
(d) A single nucleolus always corresponds to a single nucleolus organizer region (NOR).
(e) Nucleoli become heavily radiolabeled when radioactive ribonucleotides are provided to the cell.
(f) In animals and plants, the disappearance of nucleoli during mitosis correlates with cessation of ribosome synthesis.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Please help me with this question. More than one answer may be correct.
Elastin _______.
Options:
A)
has a repeating structure of 3 amino acids such as Gly-Pro-X
B)
crosslinks with numerous other elastin peptides to make an elastic fiber
C)
is physically attached to the smooth endoplasmic reticulum
D)
is physically attached to ribosomes
E)
is rich in hydrophobic residues
Please help me with this question. More than one answer may be correct.
The cis golgi compartment ______.
Options:
A)
is a convenient place to store tools in small cars.
B)
uses clathrin as a coating protein to send vesicles to the medial compartments.
C)
sends proteins to their proper destination.
D)
is continuous with the trans compartment.
E)
adds specific signal to proteins destine for the lysosomes.
11:14
structure. They provide the matrix or ground substance of extracellular tissue spaces in
which collagen and elastin fibers are embedded. Hyaluronic acid, chondroitin 4-sulfate,
heparin, are among the important glycosaminoglycans.
10. Glycoproteins are a group of biochemically important compounds with a variable
composition of carbohydrate (1-90%), covalently bound to protein. Several enzymes,
hormones, structural proteins and cellular receptors are in fact glycoproteins.
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…
Chapter 18 Solutions
Becker's World of the Cell (9th Edition)
Ch. 18 - Suppose a triplet on the template strand of a...Ch. 18 - Of these three techniques, which one provides the...Ch. 18 - Compare and contrast bacterial and eukaryotic...Ch. 18 - The autoimmune disease systemic lupus...Ch. 18 - QUANTITATIVE Triplets or Sextuplets? In his Nobel...Ch. 18 - The Genetic Code in a T-Even Phage. A portion of a...Ch. 18 - Frameshift Mutations. Each of the mutants listed...Ch. 18 - Prob. 18.4PSCh. 18 - Locating Promoters. The following table provides...Ch. 18 - Prob. 18.6PS
Ch. 18 - Starting Up. Refer to Figure 18-30, which depicts...Ch. 18 - RNA Processing. The three major classes of RNA...Ch. 18 - Prob. 18.9PSCh. 18 - Antibiotic Inhibitors of Transcription. Rifamycin...Ch. 18 - Prob. 18.11PSCh. 18 - Cloning Conundrum. Using established recombinant...Ch. 18 - Nucleoli. Indicate whether each of the following...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- VISUALIZE Sketch a pyrimidine nucleotide subunit that would be found only in RNA. Circle and label the three components that make up this type of nucleotide. Explain what changes in the functional groups of this subunit would have to occur for it to be found in a DNA molecule.arrow_forward7 Protein structure.Circle one of the three amino acid sequences that is most likely to form a stable a-helix? RASKTARQ DASKTAEQ KPGKPAGQ In one sentence (that can be accompanied by a small picture) explain why?arrow_forward→x D. Two physical 5. A protein unfolds according to the scheme N properties (property 1 and 2) are measured at three points in the unfolding reaction where the true values of fp are 0.2, 0.5 and 0.8. The corresponding values of K = fx/ fp are 1.0, 0.4 and 0.125. For property 1, d₁ = 0.1; for property 2, d₁ = 0.2. (a) Write an equation that can be used to calculate fapp. (b) Calculate fapp using d₁ = 0.1 (property 1) and fapp using d₁ = 0.2 (property 2). (c) The error in measurement of each physical property is 5 %. Can you detect the presence of the intermediate by measuring the physical properties? Explain your answerarrow_forward
- Initiation. Bacterial protein synthesis is initiated by: a. S-adenosylmethionyl tRNA b. Methionyl TRNA c. N-formylmethionyl tRNA d. N10-formyltetrahydrofolateN"-formyltetrahydrofolate †RNA „N10arrow_forwardThis is DNA. Locate the nitrogen bases (nitrogens are blue). Where are they located in the molecule?Locate the sugars and phosphates, and describe their location. Adjacent nucleotides are linked by covalent phosphodiester bonds (-O-P-O-) produced by a condensation reaction. What parts of the adjacent nucleotides are linked by phosphodiester bonds?Two nitrogenous bases extending towards the middle of the double helix. Are there any covalent bonds between these bases?If there are no covalent bonds between these bases, what other kinds of bonds might hold the two strands of the double helix together?arrow_forwardPlease help me with this question. More than one answer may be correct. Kinesin _______. Options: A) uses ATP B) “walks” the same direction as dynein C) can bind to a kinesin receptor on a vesicle D) “walks” along a microtubule from the – side to + side E) “walks” along a microtubule from the + side to - sidearrow_forward
- .A protein gives a single band on SDS gel electrophoresis, as shown in lanes 1 and 2 below. There is little if any effect from addingarrow_forwardShape and dimension. (a) Tropomyosin, a 70-kDa muscle protein, is a two-stranded α-helical coiled coil. Estimate the length of the molecule. (b) Suppose that a 40-residue segment of a protein folds into a two-stranded antiparallel β structure with a 4-residue hairpin turn. What is the longest dimension of this motif?arrow_forwardDocking and Membrane Fusion. Q-8a. Choose from the terms below to Fill-in the Blanks. [All terms are used. Some terms are used more than once] Rab, SNARE, v- SNARE, t-SNARE, Tethering a. Identification of a vesicle to be docked depends on a diverse family of monomeric GTPases called proteins. First, a filamentous protein on a target membrane binds to a protein on the surface of a vesicle. This interaction allows the vesicle to dock on its particular target membrane. A on the vesicle then binds to a complementary_ on the target membrane. Whereas and proteins provide the initial recognition between a vesicle and its target membrane, complementary appropriate target membranes. Together, the proteins ensure that transport vesicles dock at their proteins catalyze the final fusion of the two membranes by squeezing out water making fusion more energetically favorable. b. What does the acronym SNARE stand for? c. Membrane fusion the rate limiting step of vesicular transport. Why? (What makes…arrow_forward
- Dynamic instability causes microtubules either to grow or to shrink rapidly. Consider an individual microtubule that is in its shrinking phase. What would need to happen at the end of the microtubule in order for it to stop shrinking and to start growing again? Be specific! What would happen if only GDP, but no GTP, were present in the solution? What would happen if the solution contained an analog of GTP that cannot be hydrolyzed?arrow_forwardPlease help me with this question. How many amino acid residues are in the heavy and light chains of the Fab fragment, and how many amino acid residues are in lysozyme?arrow_forwardprotein synthesis 2 When the DNA sequence TGACT is copied to RNA, the sequence in RNA will be Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a UCTGU TGUCT TGACT ACUGAarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning
Biology (MindTap Course List)
Biology
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Cengage Learning
QCE Biology: Introduction to Gene Expression; Author: Atomi;https://www.youtube.com/watch?v=a7hydUtCIJk;License: Standard YouTube License, CC-BY