Select the phrases that accurately describe properties of the most common form of the DNA double helix.DNA contains equal amounts of adenine and thymine and equal amounts of cytosine and guanine.The nitrogenous bases are exposed to the solvent, whereas the sugar-phosphate backbone of each nucleotide strand isin the interior of the double helix.The phosphodiester bonds between nucleotide residues run in opposite directions in the two strands.Base pairs have a spacing of 3.4 Å.A helical turn consists of about 3.4 base pairs.

B-DNA is the most stable and predominant form of DNA under physiological conditions. The structure…

Answered: Select the phrases that accurately…

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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In chromosomes, doubly-stranded DNA wraps tightly around histone proteins. Think about the structure of DNA, especially the "backbone," and determine what category of amino acids make up the majority of histones: Histone Octamer tetramer dimer HZA dimer dimer dimer Histone "fastener" Here the blue represents histones, and the red is the DNA strand. To help the DNA fold up in an aqueous environment, the histones are nonpolar to exclude water, so many of the amino acid side chains are nonpolar. The backbone of DNA is the alternating phosphate-sugar part, and the phosphate is negatively charged. Positive charges on the histone residues will bind tightly here, so the acidic amino acids are used here. The backbone of DNA is the alternating phosphate-deoxyribose part, and the phosphate is negatively charged. Positive charges on the histone residues will bind tightly here, so the basic amino acids are used here. The histones are strongly attracted to the hydrogen-bonding of the base pairs, so…
Protein synthesis is a complicated process involving DNA being transcribed to RNA, which is then translated into amino acids. Complete the DNA-to-amino acid table for three consecutive codons with the appropriate nucleotides and amino acids using a codon table. Nucleotide and amino acid options can be used multiple times or not at all. 5' to 3' DNA strand T T A G A G 3' to 5' DNA strand A A T C T C G C G transcribed mRNA U U A G A G C G C TRNA anticodon A. A U C U G C G amino acid leucine glutamic acid Answer Bank A glutamic acid leucine cysteine arginine proline U
Determine the melting point for the three DNA samples and list two factors that could affect the DNA sample
. Which of the following equations is a prediction based on Chargaff’s rules for the content of DNA? adenine + thymine = guanine + cytosine thymine + adenine = cytosine + guanine guanine + cytosine = adenine + thymine cytosine + guanine = thymine + adenine adenine + cytosine = thymine + guanine
Total nucleic acids are extracted from a growing culture of yeast cells. They are then mixed with specialized beads to which the single-stranded DNA molecule with sequence 5’-TTTTTTTTTTTTTTTTTTTTTTTTT-3’ has been covalently attached to the surface (see image to the right, where each black line represents a polynucleotide sequence). After a short incubation time, the beads are removed from the mixture. When you analyze the cellular nucleic acids stuck to the beads, which type of nucleic acid (i.e. DNA, rRNA, etc.) do you expect to be the most abundant? Why?
The figure shows that the average distance between base pairs measured parallel to the axis of a DNA molecule is 3.4 Å. The average molar mass of a pair of nucleotides is 650 g•mol-1. Estimate the length in cm of a DNA molecule of molar mass 5.1x109 g•mol-1. 4.0 cm Roughly how many base pairs are contained in this molecule? 4.0 7.1e6 X base pairs AT CG OH O-P=D0 G C TA Adenine Thymine OH CH2 N-H.......O CH3 H -N N..... G C H A Он C G G C TA AT OH CH2 Cytosine Guanine H. O.......H-N H H' H N…**H-N HLH O N-H..... H2C OH TA OH CH2 (b) The most common structure of DNA, which is a right-handed double helix. The two strands are held together by hydrogen bonds and other intermolecular forces. (a) Base-pair formation between adenine (A) and thymine (T) and between cytosine (C) and guanine (G).
Consider normal B-form DNA. It forms a regular antiparallel double-helical structure with Watson-Crick base-pairing mediated through hydrogen bonding. The base pairs all stack upon one another, with 3.4 Å spacing between them. DNA strands having a complementary sequence will spontaneously form a double-helix in an aqueous solution. In terms of energy, what primarily drives helix formation? O Positive Entropy from base stacking van der Waals interactions O Hoogsteen interactions Positive Enthalpy from Hydrogen Bonding between GC and AT pairs Negative Enthalpy from Hydrogen Bonding between GC and AT pairs O Negative Entropy from base stacking
An influx of positive sodium ions eventually causes closing of the inactivation gates of voltage regulated sodium channels, stopping the influx of positive sodium ions, and thus the final stages of an action potential are regulated by _____ feedback.
What determines the sequence of nucleotides in the template strand of DNA? (The answer can be very basic don’t need lots of details)
In your own words
Below is the 5’–3’ strand of a double-stranded DNA molecule with the following nucleotidesequences (all belong to an exon):5’ C C T A T G C A G T G G C C A T A T T C C A A A G C A T A G C 3’ 1. If the above DNA strand is the template (antisense) strand and the DNA molecule is transcribed that produced a functional mRNA. Assuming there are no mutations, the said mRNA is then brought to the site of protein synthesis,a. what would be the amino acid sequence of the synthesized polypeptide chain?b. how many possible kinds of tRNA molecule that will bring the 2nd amino acid observing wobble hypothesis? List down their anticodons.
How many times wider is a 30 nm fiber than a DNA double helix? Show your work.

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