EBK CONCEPTS OF GENETICS
12th Edition
ISBN: 9780134818979
Author: Killian
Publisher: YUZU
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Chapter 12, Problem 13PDQ
Assume that a viral DNA molecule is a 50-μm-long circular strand with a uniform 20-Å diameter. If this molecule is contained in a viral head that is a 0.08-μm-diameter sphere, will the DNA molecule fit into the viral head, assuming complete flexibility of the molecule? Justify your answer mathematically.
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Please give me correct solution for both questions c and d.
A biological motor used to package double-stranded (ds) DNA into viral capsids is able toexert 50 pN of force.
A. If the active site has a surface area of 10^-17 m2 , to what pressure can the biological motor package dsDNA within the viral capsid before stalling?
B.If the viral capsid has a radius of 30 nm, how much potential energy is stored due to the pressure-confinement of the dsDNA within the capsid?
C. Compare this to thermal energy at room temperature, kBT, where kB=1.38*10^-23 J/K is the Boltzmann constant.
Given the fact that 1 fg of DNA = 9.78 * 105base pairs (on average), you can convert the amount of DNA per cell to the lengthof DNA in numbers of base pairs. (a) Calculate the number of basepairs of DNA in the haploid yeast genome. Express your answer inmillions of base pairs (Mb), a standard unit for expressing genomesize. Show your work. (b) How many base pairs per minute weresynthesized during the S phase of these yeast cells?
Chapter 12 Solutions
EBK CONCEPTS OF GENETICS
Ch. 12 - In bacteriophages and bacteria, the DNA is almost...Ch. 12 - After salivary gland cells from Drosophila are...Ch. 12 - If a human nucleus is 10 m in diameter, and it...Ch. 12 - Roberts syndrome is a rare inherited disorder...Ch. 12 - Prob. 2CSCh. 12 - Roberts syndrome is a rare inherited disorder...Ch. 12 - HOW DO WE KNOW? In this chapter, we focused on how...Ch. 12 - CONCEPT QUESTION Review the Chapter Concepts list...Ch. 12 - Contrast the size of the single chromosome in...Ch. 12 - Describe the structure of giant polytene...
Ch. 12 - What genetic process is occurring in a puff of a...Ch. 12 - During what genetic process are lampbrush...Ch. 12 - Why might we predict that the organization of...Ch. 12 - Describe the sequence of research findings that...Ch. 12 - Describe the molecular composition and arrangement...Ch. 12 - Describe the transitions that occur as nucleosomes...Ch. 12 - Provide a comprehensive definition of...Ch. 12 - Mammals contain a diploid genome consisting of at...Ch. 12 - Assume that a viral DNA molecule is a 50-m-long...Ch. 12 - How many base pairs are in a molecule of phage T2...Ch. 12 - Examples of histone modifications are acetylation...Ch. 12 - Contrast the structure of SINE and LINE DNA...Ch. 12 - Variable number tandem repeats (VNTRs) are...Ch. 12 - It has been shown that infectious agents such as...Ch. 12 - Cancer can be defined as an abnormal proliferation...Ch. 12 - In a study of Drosophila, two normally active...Ch. 12 - Prob. 21ESPCh. 12 - An article entitled Nucleosome Positioning at the...Ch. 12 - Prob. 23ESPCh. 12 - Following is a diagram of the general structure of...Ch. 12 - Microsatellites are currently exploited as markers...Ch. 12 - At the end of the short arm of human chromosome 16...
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- A DNA sequence consists of a string of elements called nucleotides, in a defined order. Suppose the DNA sequence of a virus is 20 nucleotides long. If each nucleotide can be either a G, T, C, or A, how many different sequences are possible?arrow_forwardFor a linear B-DNA molecule of 50,000 kb, calculate (a) the contour length and (b) the length of the DNA as packaged in nucleosomes with linker histones present.arrow_forwardIn not more than 200 words, explain how the human genome of 3.4 Gb would be in 2.3 meters long when stretched linearly if this size is fit into a cell of minuscule proportions.arrow_forward
- The Bacteria Escherichia coli DNA genome has a molecular mass of about 3.1 X 10° D. In your answers, show how you came up to each result? (a) How many base pairs does this bacterium contain? (b) How many full double-helical turns does this DNA contain? (c) How long is this DNA in µm?arrow_forwardThe DNA sequence of the genome of a virus is known and contains equal number of A, TG and C. The genome is composed of double stranded DNA molecule. It is 10Kb in length. If one searches the genome for the presence of the following sequence 5'-AAAAAA-3'/3'-TTTTTT-5', predict the number of such stretches that are likely to occur. (1Kb = 1000 base pairs). a) Two b) Eight c) Sixteen d) Thirty twoarrow_forwardRNA was extracted from certain virus and found to contain 35% cytosine. With this information, is it possible to predict what percentage of the bases in virus are adenine? If so, what percentage? If not, why not?arrow_forward
- Give Detailed Solution with explanation (no need Handwritten)arrow_forwardThe DNA chromosome in E. coli contains approximately 4 million base pairs. The average gene contains about 1500 base pairs. Use this information to calculate the following (show all work ): a) The length in meters of this chromosome. b) The approximate number of genes in the chromosome (assuming no wasted DNA).arrow_forwardThe Tm of a DNA strand can be calculated by hand using the formula: (2 ℃)(?????? ?? ? + ?) + (4 ℃)(?????? ?? ? + ?) = ??℃ Using this formular, calculate the Tm for the following DNA sequence: [CTTTCACAGCCACTATCCAGCGGTAC] Note: This formula has several limitations and is not useful for sequences longer than 14 bp. Use the Internet search to find an online Tm calculator. Use this calculator to find the Tm of the above sequence. Using information from your search, identify three factors that can affect the Tm.arrow_forward
- The sequences of several short single-stranded DNA molecules are shown below. Imagine each sequence as a typical double-stranded DNA molecule, with antiparallel strands held together by Watson-Crick base- pairs between the complementary bases. Which of these double-stranded molecules would have the highest melting temperature (Tm)? 5' ACTGAGTCTCTGACTAGTCT 3' 5' ACTTAGTCTATGACTAGTCT 3' 5' ACTTAATCTATGAATAGTCT 3' 5' ACTGCGTCTCCGACTAGTCT 3' 5' ACTGCGTCTCCGACGAGCCT 3'arrow_forwardSuppose that a length of double-stranded DNA is 2520 base pairs long. Calculate the number of helical turns if the DNA were in the B form, given that B-form DNA contains 10.5 base pairs B form: helical turns per helical turn. Calculate the number of helical turns if the DNA were in the Z form, given that Z-form DNA contains 12 base pairs per Z form: helical turns helical turn.arrow_forwardWhen the helix axis of a closed circular duplex DNA of 2310 bp is constrained to lie in a plane, the DNA has a twist (T) of 207. When released, the DNA takes up its normal twist of 10.5 bp per turn. Indicate the values of the linking number (L), writhing number (W), and twist for both the constrained and unconstrained conformational states of this DNA circle. What is the superhelix density, σ = W/T, of both the constrained and unconstrained DNA circles?arrow_forward
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