Question 25Proteins synthesized on free ribosomes are transported to which cellular destination?lumen of the endomembrane systemsecretory vesiclesinterior of membranescytosolic surface of membranesQuestion 26Which of the following transport mechanisms within the cell are for cytosolic proteins delivered to the peroxisomes?O transmembrane transportvesicular transportO mitochondrial transportO gated transport

As per the central dogma of molecular biology, the genetic information stored in the DNA is copied…

Answered: Question 25 Proteins synthesized on…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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QUESTION 20 You are studying the effects of removing integrins from cells. Which of the following abilities is the cell most likely to lose? A The cells are going to lose their ability to make connections with the ECM. B The cells will lose their ability to secrete growth factors. C The cells are going to lose their ability to form cell-cell adhesions. D The cells are going to lose their ability to communicate with the cytoskeleton.
QUESTION 32 All living organisms, including both bacteria and Eukaryotes have: (Select all that apply) the ability to extract energy from the environment to do work Ribosomes double stranded DNA L-amino acids Peptidoglycan Nuclei D-monosaccharides Plasma membranes made of phospholipids Robust cytoskeleton, including actin and microtubules
QUESTION 14 Which of the following statements is FALSE? A Microtubules will rapidly disassemble in response to a drop in the ATP concentration. B G-actin monomers and alpha-tubulin/beta-tubulin dimers assemble into filaments in their ATP-bound and GTP-bound forms, respectively. C Microtubules are stabilized by microtubule-binding proteins, such as Tau. D Actin-binding proteins allow F-actin to assemble in cells in many different ways. E Hydrolysis of ATP and GTP changes the conformation of the monomers once they are incorporated into actin filaments and microtubules, respectively.
QUESTION 21 You are in charge of generating a scaffold for use in tissue engineering applications that behaves similarly to the natural ECM proteins. What proteins might you want to include in your scaffold? A Fibronectin only B Collagen, fibronectin, and proteoglycans C Proteoglycans only D None of the above are proteins in the ECM E Collagens only
Question 17 Which of the following activities are present in the endomembrane system organelles? I. glycoprotein synthesis II. calcium sequestration III. glycosylation IV. di-sulfide bond formation and protein folding I, II, III, Iv II, III, IV only I, II, III only I, II, IV only
QUESTION NO. 1 Cystic fibrosis is a frequent generic disease of Caucasians. The CF gene codes for a protein called the cystic fibrosis transmembrane conductance regulator (CFTR) which functions as a cAMP-regulated chloride channel. The protein has two membrane-spanning domains, two domains that interact with ATP, and one regulatory domain. The most common defect is in the gene for one of the ATP binding domains. The result is a protein that does not fold correctly in the endoplasmic reticulum, is not properly glycosylated, and is nor transported to the cell surface. Rather, it is degraded in the cytosol within proteasomes. Drugs that foster chaperone interaction with the mutant protein are a potential therapeutic approach. Chaperones A. are always required to direct the folding of proteins. B. when bound to protein increase the rate of protein degradation. C. usually bind to strongly hydrophilic regions of unfolded proteins. D. sometimes maintain proteins in an…
QUESTION 10 Which of the following is NOT true of intermediate filaments? A They provide mechanical strength to cells. B They are composed of 8 oppositely oriented tetramers that are assembled into a rope-like filament. C They have a non-polar orientation. D They are rigid and do not deform before breaking E Keratins, neurofilaments, vimentin, and desmin are examples of intermediate filaments.
Question 14. Match the transport process to the correct description or example. Secondary Active Transport is: Group of answer choices transport of signal molecules out of an endocrine cell transport of glucose into a cell, against its concentration gradient making a new covalent bond transport of a steroid hormone into a cell transport of glucose out of cell, with its concentration gradient breaking of a covalent bond to create new molecules transport of sodium out of a neuron import of an entire bacterium into a white blood cell transport of large macromolecules into a cell
QUESTION 29 Which of the following is NOT a primary method used to regulate the activity of cyclin-dependent kinases (cdks)? A. Binding to cyclins B. Binding to a CDK inhibitor C. Dephosphorylation of a specific amino acid D. Degradation by a proteasome E. Phosphorylation on a specific amino acid
QUESTION NO. 1L-Carnitine is synthesized primarily in the liver but also in the kidneys and then transported to other tissues. It is most concentrated in tissues that use fatty acids as their primary fuel, such as skeletal and cardiac muscle. In this regard, L-carnitine plays an important role in energy production by conjugating to fatty acids for transport from the cytosol into the mitochondria. L-carnitine shuttle is an example of A. ion driven active transport B. facilitated diffusion C. simple diffusion D. ATP driven active transportE. symport F. antiportQUESTION NO.2 Statements: (1) Glucose is both a hexose and a aldose. (2) There can never be more than three enantiomers for a molecule. (3) All common disaccharides have beta-one-four linkages. Which statements are true?
QUESTION 16 Which integral membrane protein are responsible for communicating signals from the extracellular matrix and/or basement membrane proteins to the cytoskeleton? A Fibronectin B Adherens junctions C Cadherins D Integrins
QUESTION 19 Match the cellular junction with its characteristic (side of cell, cellular role, intracellular connection or transmembrane protein) tight junctions focal adhesions desomsomes gap junctions A. integrins link the actin-myosin stress fibers to the extracellular matrix B. connexons form pores between cells in an epithelial sheet or tube C. link the intermediate filaments of neighboring cells using homophilic cadherin-cadherin binding D. occludins bind to occludins and prohibit the diffusion of membrane proteins from the baso-lateral surface to the apical surface of epithelial cells

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