DQuestion 7716) Region A17) Region B18) Region CRegion A CH3(CH2)12-CH=CH-CH-OHRegion BRegion C16)17)A) nonpolarB) neitherC) polar18)OCHNHC(CH2)12CH3OCH₂-O-P-O-CH₂CH2-N-CH3O-[Choose ][Choose ]CH3| +[Choose ]CH3

A biological membrane has lipids as an essential component. It includes phospholipids and…

Answered: 16) Region A 17) Region B A) nonpolar…

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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No explanation needed just the letter of correct answer 2. DNA in cells is damaged: a) Millions of times a day. b) By collisions with other molecules or by chemical accidents and radiation. c) Not very often¸ and by radiation only. d) a and b 3. For genes that code for proteins, which molecule conveys the information from the gene to the ribosome? a) DNA b) mRNA c) tRNA d) rRNA 4. Which of the molecules below is produced during replication? a) mRNA b) rRNA c) tRNA d) DNA 5. Why is there a difference between the synthesis of a lead strand and that of a discontinuous strand in DNA molecules? a) The origins of replication are found only at end 5' of the molecule. b) Helicase and protein factors act at the extremity of 5'. c) DNA polymerases can only add new nucleotides at the extremity 3' a strand in the process of synthesis. d) DNA ligase only works in the 3' ; direction towards 5'. 6. Which of the following statements does not apply to a codon? a) It is made up of three nucleotides. b)…
32
The nuclear pore complex consists of an assembly of eight spokes attached to rings on the cytoplasmic and nuclear sides of the nuclear envelope. a) True b) False The outer nuclear membrane is similar to the E.R. and has ribosomes bound to the cytoplasmic (outer) surface. a) True b) False
43) The major setback for the use of Transmission Electron Microscope is that: a) You can’t stain the sample with colored dyes b) You can’t see internal structures of the cell c) You can’t focus on Organelles inside the cell d) you can’t focus on cell membranes44) The major advantage of using the Scanning Electron Microscope (SEM) over the Transmission Electron Microscope (TEM) is that: a) You can use live material in looking through the SEM and not the TEM b) You can look at internal structures with SEM & not TEM c) You can use higher magnifications with SEM d) You can look at solid objects with SEM45) The image that you are observing in the SEM comes from: a) Direct reflection/bouncing of electrons from the specimen you are looking at b) Backscattered electros from the secondary electrons from the specimen c) A contrast between the texture of the specimen you are looking at d) A contrast between the acidophilic and basophilic components of the specimen you are looking at46) A…
In prokaryotes, after the ribosomes completes a synthesis, one would expect to find a) a new protein molecule to appear in the nucleus, b) new DNA inside the cell nucleoid, c) an increase in the amount of protein (enzyme) in the cytoplasm, d) ribosome binding to DNA, e) none are possible.
1-9
Gene therapy is used to treat defects in__________.a) Somatic cell. b) Organ c) Tissue d) Reproductive Cell
35.
1.Most human bacterial pathogens are labeled as __ according to their temperature requirement: a) Aerophiles b) Aerobes c) Anaerobes d) Psychrophiles e) Mesophiles.2) The current model that describes the contents of the plasma membrane is best described as _______ model: a) Sandwich b) fluid-mosaic c) unit membrane d) ions and pumps e) semipermeable3) Bacterial cells that do not have the SOD & catalase enzymes are labeled as: a) Aerophiles b) Aerobes c) Anaerobes d) Complex e) Mesophiles.
Which of the following can self-replicate?A) centrosomeB) mitochondriaC) peroxisomeD) B and CE) all
92. Which of the following is the most prominent ultrastructural characteristic of interstitial (Leydig) cells? A) Centrioles B) Numerous microtubules C) Rough endoplasmic reticulum D) Smooth endoplasmic reticulum E) Zymogen granules
________ cell culture is similar to that of embryonic stem culture.a) Somatic stem b) Stemc) Gened) Gametic

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16) Region A 17) Region B A) nonpolar B) neither