Homework Answers
Ans 8). TRUE
THEORY: Operons are funtional unit of DNA containing multiple structural genes ( which are being transcribed), these structural genes are under control of single promoter. RNA polymerase binds to promoter, then only these structural genes are being transcribed. Binding of RNA polymerase to promoter is controlled by few regulatory regions like operator region.
Ans 9) False
THEORY: In bacterial system introns are completely absent or are rarely present. Due to this reason both transcription as well as translation process can be carried out simultaneously.
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2 pts Question 8 In bacteria genes can be transcribed in operons. True False 2 pts...
QUESTION2 Which of the following statements is TRUE? O DNADNA hybrids and RNADNA hybrids are always...
QUESTION2 Which of the following statements is TRUE? O DNADNA hybrids and RNADNA hybrids are always antiparallel O DNA is replicated using the template strand as the template but RNA is transcribed using the sense (or coding) strand as the template. O Both DNA and RNA polymerization require a primer O Introns get spliced out of DNA and out of pre-mRNA QUESTION 3 0. Which of the following statements is FALSE? O Only Eukaryote genes have an A/T rich core...
Question 34 1 pts True or False: All bacteria can be classified as either Gram positive...
Question 34 1 pts True or False: All bacteria can be classified as either Gram positive or Gam negative. O True O False
for 1-5 define those The Lac operon is an inducible set of genes found in bacteria...
for
1-5 define those
The Lac operon is an inducible set of genes found in bacteria cells that helps the bacteria to metabolize the disaccharide lactose. When it is turned on it produces proteins that pump lactose into the bacteria cell and break it down into glucose and galactose, which can then be used by the bacteria as a source of energy The two figures below show the Lac Operon along with the lacl gene (which regulates the Lac operon...
1. Describe how bacteria regulate genes through operons. 2. What is the difference between a repressible...
1. Describe how bacteria regulate genes through operons. 2. What is the difference between a repressible and inducible genetic system? 3. Expression of the Lac operon is under the controls of (1) the Lacl repressor and (2) CAP. Consider each of the following conditions and determine which factors will be acting on the operon. Predict the rate of gene expression. Conditions Lac Operon fon" or "off" CAP present" or "absent" at Lac Operon Predict the rate of gene expression (none,...
Question 20 4 pts MMC: For the lac operons below, choose the operons in which the...
Question 20 4 pts MMC: For the lac operons below, choose the operons in which the genes (ZYA) would likely be expressed. Terms: 1 = no functional repressor made OC = operator does not bind repressor S = the repressor does not bind the inducer P- = does not bind the polymerase No superscript = wild type OSPOZY A without lactose O IPOZY A with low levels of glucose OrPOCZY A with lactose O IPOZY A with lactose OPOZY A...
Some simple eukaryotic genes can be transcribed and translated by prokaryotes like E. coli. However, some...
Some simple eukaryotic genes can be transcribed and translated by prokaryotes like E. coli. However, some eukaryotic genes cannot be expressed by prokaryotes. Which of the following might be a reason for this failure? A. Prokaryotes are not able to cut out the introns nor are they able to O splice the exons together from the eukaryotic gene. B. the prokaryotic genetic code is sometimes different from eukaryotic code. C. Eukaryotic genes often have unique nucleotide bases which are not...
QUESTION 1 George Beadle and Edward Tatum performed an experiment in which they made single-gene mutations...
QUESTION 1 George Beadle and Edward Tatum performed an experiment in which they made single-gene mutations in the bread mold Neurospora crassa. These mutations resulted in several Neurospora auxotrophs. Further analysis revealed specifically how the mutations affected synthesis of the amino acid in question. What was the significance of these results? A single gene encodes a single protein, in the case of this experiment, an enzyme. Enzymes are needed to synthesize amino acids. They showed that mutations are heritable. They...
Question 17 1 pts True or False: Catalase protects bacteria from toxic reactive oxygen species which...
Question 17 1 pts True or False: Catalase protects bacteria from toxic reactive oxygen species which may cause oxidative damage to cells. O True O False
Question 20 3 pts recombination frequency Two linked genes that are close together usually have a...
Question 20 3 pts recombination frequency Two linked genes that are close together usually have a than two linked genes that are further apart. Question 21 3 pts DNA polymerase Ill requires to build something before it can begin replicating. 3 pts Question 22 mutations in a gene always results in a new stop codon in the transcribed mRNA
Question 13 1 pts Enzymes work most effectively at their optimal temperature and pH. True False...
Question 13 1 pts Enzymes work most effectively at their optimal temperature and pH. True False Question 14 1 pts Biochemical tests for the identification of bacteria involve testing fermentation products or amino acid catabolism. True O False
QUESTION2 Which of the following statements is TRUE? O DNADNA hybrids and RNADNA hybrids are always antiparallel O DNA is replicated using the template strand as the template but RNA is transcribed using the sense (or coding) strand as the template. O Both DNA and RNA polymerization require a primer O Introns get spliced out of DNA and out of pre-mRNA QUESTION 3 0. Which of the following statements is FALSE? O Only Eukaryote genes have an A/T rich core...
Question 34 1 pts True or False: All bacteria can be classified as either Gram positive or Gam negative. O True O False
for
1-5 define those
The Lac operon is an inducible set of genes found in bacteria cells that helps the bacteria to metabolize the disaccharide lactose. When it is turned on it produces proteins that pump lactose into the bacteria cell and break it down into glucose and galactose, which can then be used by the bacteria as a source of energy The two figures below show the Lac Operon along with the lacl gene (which regulates the Lac operon...
1. Describe how bacteria regulate genes through operons. 2. What is the difference between a repressible and inducible genetic system? 3. Expression of the Lac operon is under the controls of (1) the Lacl repressor and (2) CAP. Consider each of the following conditions and determine which factors will be acting on the operon. Predict the rate of gene expression. Conditions Lac Operon fon" or "off" CAP present" or "absent" at Lac Operon Predict the rate of gene expression (none,...
Question 20 4 pts MMC: For the lac operons below, choose the operons in which the genes (ZYA) would likely be expressed. Terms: 1 = no functional repressor made OC = operator does not bind repressor S = the repressor does not bind the inducer P- = does not bind the polymerase No superscript = wild type OSPOZY A without lactose O IPOZY A with low levels of glucose OrPOCZY A with lactose O IPOZY A with lactose OPOZY A...
Some simple eukaryotic genes can be transcribed and translated by prokaryotes like E. coli. However, some eukaryotic genes cannot be expressed by prokaryotes. Which of the following might be a reason for this failure? A. Prokaryotes are not able to cut out the introns nor are they able to O splice the exons together from the eukaryotic gene. B. the prokaryotic genetic code is sometimes different from eukaryotic code. C. Eukaryotic genes often have unique nucleotide bases which are not...
Question 17 1 pts True or False: Catalase protects bacteria from toxic reactive oxygen species which may cause oxidative damage to cells. O True O False
Question 20 3 pts recombination frequency Two linked genes that are close together usually have a than two linked genes that are further apart. Question 21 3 pts DNA polymerase Ill requires to build something before it can begin replicating. 3 pts Question 22 mutations in a gene always results in a new stop codon in the transcribed mRNA
Question 13 1 pts Enzymes work most effectively at their optimal temperature and pH. True False Question 14 1 pts Biochemical tests for the identification of bacteria involve testing fermentation products or amino acid catabolism. True O False
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