Question 1For import into the nucleus, proteins require:Ran-GTPactive transportPex5an NESQuestion 2The nuclear envelope contains nuclear pore complexes (NPCs) that allow small molecules to pass but excludes macromoleculeslarger than 40 kDaTrueFalse

The nucleus is the compartment that is generally found in the centre of a eukaryotic cell and houses…

Answered: Question 1 For import into the nucleus,…

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 23 What kind of membrane protein is found entirely outside the bilayer on either the extracellular or cytoplasmic surface? These proteins are covalently linked to a membrane lipid situated within the bilayer. O integral protein O carbohydrate-anchored protein O lipid-anchored protein O peripheral proteins
QUESTION 26 Osmosis and Diffusion of solutes do not require energy input, but active transport and facilitated diffusion need ATP. O True O False QUESTION 27 ATP is a monomer of the nucleic acid family. O True O False QUESTION 28 Cilia and microvilli are both extensions of the phospholipid cell membrane. O True O False
Question 20 Under what conditions do endospores typically form? O ideal conditions where bacteria thrive O normal conditions O harsh conditions such as extreme droughts Only when bacteria reproduce sexually through conjugation
question 48 which of the following options is NOT a function of the Golgi apparatus ed Select one: out of O a. Synthesis of polysaccharides like cellulose question O. b. Modification of glycoproteins O c. Sorting and packaging of materials into vesicles O d. Synthesis of pectins O e. Tagging of vesicles with molecular markers
Question 7
Question 1: A Small organic mdecule_containimg both an -NH2 group Oroup is čalled a Cm) [x]; t serves as the building block of proteins. and a - COOH Question 2: A [x] forms the structural basis of all cell membranes it is composed of a double layer of phas pholipid mokcules packed tegether in sheet. Buestion 3: A[x] can be a it has a general formula of lCH, 0)n Inoromer of complex corbohydrates and pely saccarides
Question 16 Proteins imported into the nucleus are transported via which mechanism? tranlocational transport transmebrane transport gated transport vesicular pransport Question 17 The GroES-GroEL macromolecular complex eubacteria undergoes conformational change; the cis inner cavity widens and elongates as it hydrolyzes bound ATP. True O False Question 18 Dnak is a heat-shock protein 70 in E. coli that stabilizes newly synthesized polypeptides and preserves folding competence O True O False Question 19 What is the correct order of sequence for the mechanism of translocation? 1. The SRP is released, the ribosome binds to a membrane translocation complex, and the signal sequence is inserted into a membrane channel. 2. Cleavage of the signal sequence by signal peptidase releases the polypeptide into the lumen of the ER. 3. The SRP escorts the complex to the ER membrane, where it binds to the SRP receptor 4. As the signal sequence emerges from the ribosome, it is recognized and bound by…
Question 8?
QUESTION 8 What is the rate-limiting step in the assembly of both microtubules and actin microfilaments that occurs in cells but does not occur in a test tube when purified monomers in the tube together with the appropriate energy source? A Elongation B Nucleation C Treadmilling D Depolymerization E Association with binding proteins
Question 5 What is the role of TRF2 at the telomere? extends the 3' end of the G+T strand O packages DNA into heterchromatin O forms a platform for microtubule attachment O facilitates formation of the t-loop at the telomere and recruits RAP1
QUESTION 8 What is the role of cholesterol in the phospholipid bilayer shown? increases permeability of the membrane. increases membrane fluidity by creating space between saturated lipids. decreases effect of the fluid mosaic model in the cellI. decreases membrane fluidity when the fatty acids are saturated O 000
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Question 1 For import into the nucleus, proteins require: Ran-GTP active transport Pex5 an NES Question 2 The nuclear envelope contains nuclear pore complexes (NPCs) that allow small molecules to pass but excludes macromolecules larger than 40 kDa True False