Question about molecular genetics | Homework Help

Suppose that the genes required for Isoleucine (an amino acid) biosynthesis are contained within an operon. If the cell is grown in the presence of high amounts of isoleucine you would expect to find:The repressor protein to bind to the operator, allowing transcription.The repressor protein to bind to the operator, preventing transcription.The repressor protein released from the operator, preventing transcription.The repressor protein released from the operator, allowing transcription.Question 2

The tRNA with UAU as the anticodon would be attached to which amino acid?isoleucineserineleucinetryrosineQuestion 3 

In an expression plasmid, the origin of replication: _________________Is the position where the base number begins at 1.allows for growth of plasmid containing bacteria in the presence of antibiotics.is responsible for the replication of mRNA.allows the bacteria to duplicate the plasmid.Question 4

The difference between the genome of an organism and the epigenome is: _____________________The accumulation of mutations in the DNA sequence.The epigenome refers to changes in DNA expression due to changes in DNA packaging.nothing, both terms refer to the genetic content of an organismQuestion 5 

Which of these is not used in DNA replication?HelicaseDNA polymerasePrimerRNA polymeraseQuestion 6

During cell division, the chromosomal DNA becomesmore condensedless condensedthere is no change in the condensation level.Question 7

The correct order of DNA segments in an operon is:Promoter, structural genes, operator.Promoter, operator, structural genes.Operator, structural genes, promoter.Operator, promoter, structural genes.Question 8

Is the following statement true of prokaryotic cells, eukaryotic cells or both? One gene can encode multiple different proteins (different in amino acid sequence).ProkaryoticEukaryoticBoth prokaryotic and eukaryoticQuestion 9 

Which of the following terms refers to a region of a chromosome that has a specifiic function?DNAGeneAlleleGenotypeQuestion 10 

Which of the following DNA sequences is a recognition site for restriction endonucleases:TTTTAATTTAATATTAAAAAQuestion 11 

Separation of the original DNA strands is due to the action of:polymerasehelicaseRNA primerssingle stranded binding proteinQuestion 12

The following mRNA: ATG CAT CAT, codes for which of the following amino acids:Tyr Tyr ValVal Tyr TyrMet His HisQuestion 13 

A gene codes for a protein that is 500 amino acids long. Which of the following mutations is likely to be the most deleterious?a nonsense mutation at the 490th codona missense mutation at the 490th codona nonsense mutation at the fifth codona missense mutation at the fifth codonQuestion 14  

Which of these is not used in DNA replication?RNA polymerasePrimerHelicaseDNA polymeraseQuestion 15 

 Is the following statement true of prokaryotic cells, eukaryotic cells or both? Multiple genes can be transcribed together into a single mRNA.ProkaryoticEukaryoticBoth prokaryotic and eukaryotic