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Bio test #4 part 2

QuestionAnswer
In sickle cell anemia, the defective hemoglobin differs from the normal hemoglobin by a single amino acid substitution.
If a human female has two Barr bodies, it is almost certain that she developed from a fertilized egg with 3 X chromosomes.
The geneticist who discovered the white eye mutation in Drosophila and helped establish that genes are carried on chromosomes was Morgan.
The classic experiments performed by Creighton and McClintock in Maize provided evidence for the physical exchange of genetic material.
Humans who have lost even one copy of an autosome are called monosomics.
In Drosophila, dosage compensation is controlled by the male-specific lethal (MSL) complex consisting of MSL proteins and roX RNAs. Based on what you know about dosage compensation, the role of the MSL complex would be to INCREASE the level of expression on the X chromosome approximately 2 fold.
The "one gene-one enzyme" hypothesis was proposed by Beadle and Tatum.
The nucleotide sequence of a mRNA codon is composed of how many bases? 3
Replication of DNA is semiconservative.
Which of the following is not a component of nucleic acids? protein
In 1952, Hershey and Chase confirmed Avery's (1944) results that DNA was the repository for hereditary information.
If a short sequence of DNA is AATTGCCGT, its complement is TTAACGGCA.
What problem is overcome by the presence of more than one promoter element? The orientation of transcription can be established.
The tRNA nucleotide sequence that lines up on the mRNA is an anticodon.
The hereditary information in DNA is conveyed through the production of many proteins and polypeptides.
The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a phosphodiester bond.
As the two strands of DNA are unraveled, an enzyme relieves the strain on the two strands. The enzyme is DNA gyrase.
Which of the following is not a component of nucleic acids? protein
Eukaryotic mRNA molecules are occasionally interspersed with non-coding sequences that must be removed before protein synthesis. These are called introns.
A bacteriophage typically attaches to the bacterium and then injects its nucleic acid into it, and then the ghost virus stays outside.
Each amino acid has a specific tRNA molecule that can transport it to the site of protein synthesis. Therefore, in humans the number of different tRNA molecules would be 20.
Avery and his coworkers showed the "transforming principle" as DNA.
Because nucleic acid sequence information is changed into amino acid sequence information, polypeptide synthesis is known as translation.
The method of DNA replication, where each original strand is used as a template to build a new strand, is called the semiconservative method.
The double helix model was proposed by Watson and Crick.
Created by: evie mcintyre
 

 



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