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Chapter 110: Answers Explained
In order for a gene to be transcribed, it must be binding to the promoter.
When an active repressor binding to the operator, transcription is blocked.
Allolactose prevents the repressor from binding to the operator.
This allows the promoter to turn on the operon.
Although it is a true statement, Choice D doesn't say anything about transcription.
The substance from the dead X-strainbacteria was transferred to the Y-strain cells.
The "transformation factor" was identified by the work of the three authors.
It is responsible for the random inactivation of one of the X chromosomes in a human female.
If this happened, females would have double the normal X chromosomes genes and the proteins that are produced from it.
Alternative splicing involves the fact that a single gene can be transcribed in many different ways.
bacteria can take genes from otherbacteria The reverse transcriptase is found in retroviruses.
Deletions cause a reading frame shift.
A reading frame shift at the beginning of an exon or coding sequence would be the most serious because it would disrupt the lengthy sequence that follows.
For the same reason, one at the end of an exon would be less serious.
exons and introns are not included in the human genome.
There are structures that remove introns unrelated to the question.
After it has been translated, Choice D is not a correct statement.
The mechanism that controls how much is degradation.
There are three types ofRNA.
The three stages of transcription are initiation, elongation, and termination.
The process occurs in a semiconservative fashion.
According to the base-pairing rules, the codons of the mRNA strand at the ribosome are carried by the tRNA molecule.
Take a look at the sketch of a stretch of DNA.
Each will have a band on the gel.
There is one large piece, one small piece, and one very small piece.
It was the first restriction that was discovered.
It cuts DNA at certain recognition sites.
Choice A is referring to T2 bacteriophage.
Choice B refers to the bacterium E. coli, not the restriction enzyme.
Eco RI is not a correct choice.
It is not possible to add nucleotides to a naked strip of DNA.
There must be a primer there first.
Choice A is referring to something.
Choice B is referring to a single strand.
Choice D is referring to something.
UUU and UUA both code for phenylalanine.
Malaria is endemic in West Africa and Southeast Asia.
People with the trait are resistant to Malaria.
It is not common in the Middle East.
Caucasians are less likely to suffer from the disease than do people of other races.
There are similarities between codons and anticodons.
It was the radioactive 32 P part of DNA that entered the E. coli.
That fact proved that the material is heritable.
The radioactive 35 S did not enter the E. coli.
It is important to remember that the RNA contains uracil.
The AGA strand is 3'-ACU UCU GGC-5' if the DNA segment is 5'.
Introns are removed with the help of snRNPs and a 5' cap and poly(A) tail are added.
There are three replacements for the word "thymine" in RNA.
The pyrimidine is the purine.
It leaves 44% for adenine and thymine.
The percentage of thymine in the DNA is 22%.
Read the chart to find out the amino acid for that codon.
None of the other choices fit the pattern.
The AGU codes for the serine and AGC codes for the AGC.
The GGU codes for the glycine and the GGG versions.
Multiple codons produce the same amino acid, so there is no change in the sequence.
No polypeptide will be produced when the cell stops reading the strand.
If the triplet in DNA isAAA, the codon on the mRNA and the anticodon on the tRNA is UUU.
The majority of the remaining DNA is involved with gene regulation.
They can turn normal proteins into misfolded ones.
The promoter can be binded to with the help of the repressor.
transcription occurs when the promoter is binding to the RNA polymerase.
The lac operon does not allow for transcription when the repressor is binding to the operator.
Small pieces of DNA are amplified by a cell-free system.
Restriction is found inbacteria.
Eco RI was the first restriction enzyme to be discovered.
Every person has a set of RFLPs.
If this were not the case, females would have more X chromosomes product than males.
The Barr body can be seen under a microscope as a spot on the X chromosomes.
The X chromosomes that are random are in any one cell.
In the three trillion cells that make up the human body, half of them have one active X chromosomes and the other half have an inactive X chromosomes.
The 5' end is marked by OH and the 3' end by phosphate.
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