Question 21 of 25What are Gram-negative bacteria?Select the correct response(s):They have a cell wall made-up of a thick layer of peptidoglycan and with carbohydrate-lipid complex.✓ They have a cell wall made-up of a thin layer of peptidoglycan and with protein-carbohydrate complex.They have a cell wall made-up of a thick layer of peptidoglycan and with protein-carbohydrate complex.They retain crystal violet dye and thus are stained purple.They cannot retain safranin and are stained purple by crystal violet.They have a cell wall made-up of a thin layer of peptidoglycan and with carbohydrate-lipid complex.They cannot retain crystal violet dye and are stained pink by safranin.21

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Answered: Question 21 of 25 What are…

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 4 An N-linked glycoprotein contains a glycan covalently linked to which specific amino acid in a protein? Serine ● Asparagine Glutamine Threonine Question 5 Membrane-bound ribosomes synthesize proteins that are destined to the following organelles, EXCEPT lysosomes endosomes secretory vesicles mitochondria Question 6 Which molecular chaperone associates with ribosomes to prevent improper folding of polypeptide as they are being synthesized? O Chaperonins Hsp 40 O Hsp 90 Trigger factor
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
QUESTION 41 You are doing research on a bacterium that undergoes gliding, not surprisingly you note the bacterium produces what? • A. capsule • B. hamus/hami • C. slime layer D. surface array layer (S layer) • E. stalk
Question 6 When light hits the special light-reactive molecular units inside rod cells, how do these units respond? They break in half and float into the eye's vitreous humor One bond shifts positions from cis to trans orientation they form a dehydration synthesis reaction with neighboring units, forming cross bridges O they open Na+ channels which rush into the cell Question 7 Which of the following about eyes is NOT RIGHT? O Spiders have image forming eyes O Sea Stars have eye spots O some compound eyes in arthropods have tiny lenses O cephalopods evolved eyes from early vertebrates
Question 23 of 25 Among the given statements, which ones describe the lysosomes? Select the correct response(s): They bud off from the trans face of the rough endoplasmic reticulum. They bud off from the trans face of the Golgi apparatus. They contain enzymes that are activated at physiologic pH. They bud off from the cis face of the Golgi apparatus. They contain enzymes that are activated above the physiologic pH. They contain enzymes that are activated below the physiologic pH. They contain enzymes that are activated below or above the physiologic pH. They bud off from the cis face of the rough endoplasmic reticulum. 23
Question 5 Thinking about the staming patterns with wright stain, and how the DNA and cytoplasmic RNA are stained, one the following would appear as a pinkish Basophile stippling ⒸHB C Heinz bodies ⒸH₂H € OC
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 28 Multiple Choice: What type of interaction leads to the formation of scrapies-associated fibrils (SAFS) that are associated with prion diseases? O Intersubunit beta sheets Intrasubunit beta sheets Domain-swapped alpha helices Metal ions bound between subunits QUESTION 29 True/False: The types noncovalent interactions that give a protein its tertiary structure are the same as those that are involved in giving a protein quaternary structure O True False O O
QUESTION 38 What is responsible for degrading misfolded proteins in the cytoplasm? OA. Peroxisome B. Proteosome OC. Endosome O D. Lysosome QUESTION 39 What is the primary function of molecular chaperones? OA. They transport secretory proteins into secretory vesicles. OB. They bind to glycosylases to assist in proper protein glycosylation in the Golgi. OC. They bind only to misfolded proteins to help them obtain their proper tertiary structure. OD. They bind proteins only after translation is complete to help them to fold into their proper primary structure. O E. They bind to unfolded or misfolded RNAs and help them attain their proper tertiary structure. QUESTION 40 Which sequence(s) would a protein need to be translated, targeted to the ER, and retained in the ER as an ER-resident protein? A. signal peptide sequence and KDEL sequence OB. Nuclear localization signal and signal peptide sequence OC. Nuclear localization signal and KDEL sequence OD. Signal peptide
QUESTION 10 The human form of Cdk1 phosphorylates a protein called Abl, which is a kinase itself. Abl is involved in advancing the cell cycle, but it is unclear how. What problem may result if Abl is constitutively active (cannot be turned off)? QUESTION 11 What protein complex has to get loaded onto DNA during G1 but only gets activated during S phase? МСМ helicase the kinetochore The ATM DNA damage sensor O DNA polymerase QUESTION 12 are necessary for cyclin-dependent kinases to work. QUESTION 13 block cyclin-dependent kinases, turning them off. QUESTION 14 phosphorylate substrates that actually do something to move the cell cycle forward (for example, one of these phosphorylates proteins attached to the nuclear envelope and nuclear lamina to cause nuclear envelope disassembly at the start of mitosis).
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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