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Biological and Biochemical Foundations of Living Systems || with 100% Error-free Answers.
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Phosphatase correct answers This myosin-actin interaction forms the basis of the cross-bridge cycle (CBC), which causes muscle contraction, as in skeletal -bridge cycling (CBC) requires phosphorylation of the myosin light chain (LC20). A .............. is an enzyme that removes a phosphate grou...

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  • August 18, 2024
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  • 2024/2025
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Biological and Biochemical Foundations of Living Systems ||
with 100% Error-free Answers.
Phosphatase correct answers This myosin-actin interaction forms the basis of the cross-bridge
cycle (CBC), which causes muscle contraction, as in skeletal muscle.cross-bridge cycling (CBC)
requires phosphorylation of the myosin light chain (LC20).

A .............. is an enzyme that removes a phosphate group from its substrate

composed of actin and are dynamic
and are lengthen by polymerization or shortened by depolarization correct answers
microfilaments are

provide strucule support for the cell correct answers intermediate filaments

myosin and myosin head correct answers thick filament

tropomyosin and troponin and myosin binding sites correct answers thin filament

Any Amino acid with a -OH group
but in particular Serine and Threonine correct answers What is the likely structure of the amino
acid found at position 19 of LC20?

Asp
or any AA that is polar and/or has a charge correct answers Which amino acid is LEAST likely
found in one of the transmembrane domains of GPCR43?

epimers at an anomeric carbon atom. correct answers The stereochemical designators α and β
distinguish between:

solution listed has the greatest concentration of solute particles. CaCl2 dissociates into three ions,
making the solution listed 0.6 M in solute particles. correct answers Which ideal solution
exhibits the greatest osmotic pressure?

influx of Na+ across the motor end plate resulting in the depolarization of the muscle fiber
membrane because the influx of Na+ across the motor end plate occurs when Na+ ion channels
bind the ligand acetylcholine correct answers Which event is directly mediated by a ligand-gated
ion channel?

voltage-Na+, K+, Ca2+ channels
Ligand- Ach, GABA,NMDA, Glutamate correct answers ligand gated vs voltage gated

restriction site is a palindromic sequence four to six nucleotides long. (Palindromic means that it
reads the same backwards as forwards.) Most restriction endonucleases cleave the DNA strand
unevenly correct answers palindromic sequence

,Southern blot uses a restriction digest to differentiate between mutant and wild-type alleles. In
order for a Southern blot to be useful, the mutation should either create or eliminate a restriction
site, most of which are palindromes and 4 to 6 base pairs long. The mutation shown in this option
is the only one that disrupts a palindromic sequence, AAGCTT. This sequence is the recognition
sequence for HindIII. correct answers A single point mutation in a gene results in a
nonfunctional protein. Individuals heterozygous for this mutation were identified using a
Southern blot. Which pair of wild-type (WT) and mutant alleles most likely contains the
mutation?

P-O because in the first reaction of integration, integrase cleaves a dinucleotide from the 3BB-8-
1-prime.gif end of a strand of viral DNA. This involves the cleavage of a P-O bond. correct
answers What bond is cleaved by IN during the first reaction of integration?

HIV is an RNA virus. It injects RNA into the host cell. With that package also comes reverse
transcriptase, integrase, and protease. These enzymes tell you how HIV works. First, reverse
transcriptase makes DNA from that injected RNA. This DNA will, of course, be complementary
to the injected RNA. Integrase then integrates the viral DNA into the host genome. Then protein
synthesis occurs by the cell's usual mechanisms, namely that DNA is transcribed into mRNA,
which will be complementary to the integrated viral DNA and therefore identical to the initial
injected viral RNA, which is translated into protein. HIV protease then clips that protein at
specific spots to activate it.

mRNA transcribed from retroviral DNA is either used to synthesize viral proteins, or used as the
RNA genome for progeny viruses. Thus, the sequence of the nucleotide in the original viral
genome will be the same as that of the transcribed mRNA correct answers A vDNA sequence
encoding a protein is inserted into a host genome by IN. The protein is translated from the
hypothetical mRNA sequence shown.

5-GGCAACUGACUA-3

Based on the passage, the segment of the original viral genome that encoded this protein had
what nucleotide sequence?

alanine


ala


A

arginine


arg

, R

asparagine


asn


N

aspartic acid


asp


D

asparagine or aspartic acid


asx


B

cysteine


cys


C

glutamic acid


glu


E

glutamine


gln

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