The RNA World hypothesis is strengthened by A. lab selection of catalytic RNA with RNA...
The RNA World hypothesis is strengthened by
A. lab selection of catalytic RNA with RNA dependent RNA polymerase activity.
B. high G:C content of rRNA.
C. catalytic activity of rRNA.
D. A and C
E. All of the above.
Homework Answers
Ans. Option d
Option a and c are correct and b is wrong because if G:C content increases then no evolution further take place and it becomes stable( in Guanine and Cytosine triple bond is present thats why more stable) .In RNA world self-replicating RNA molecules proliferated before the evolution of DNA and protein.It proposes that earlier life forms may have used RNA alone for the storage of genetic material.Short RNA molecules that can synthesize have been artificially produced in lab.
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The RNA World hypothesis is strengthened by
A. lab
selection of catalytic RNA with RNA...
6. The RNA World hypothesis includes the idea that: a. RNA is the most important molecule...
6. The RNA World hypothesis includes the idea that: a. RNA is the most important molecule in living organisms today b. Ear;ly cells could not produce because they did not yet have DNA c. Viruses evolved from RNA d. Early cells was made entirely of RNA e. Proteins may not have been necessary for the earliest biological reactions to occur 7. In early human embryos, the gene HoxB7 is involved in patterning the central nervous system. In later embryos, the...
6. The RNA World hypothesis includes the idea that: a. RNA is the most important molecule...
6. The RNA World hypothesis includes the idea that: a. RNA is the most important molecule in living organisms today b. Early cells could not produce because they did not yet have DNA c. Viruses evolved from RNA d. Early cells was made entirely of RNA e. Proteins may not have been necessary for the earliest biological reactions to occur
HELP!!! Highlighted answer is WRONG!! please help with correct one. 6. The RNA World hypothesis includes...
HELP!!! Highlighted answer is WRONG!! please help with correct
one.
6. The RNA World hypothesis includes the idea that: a. RNA is the most important molecule in living organisms today b. Early cells could not produce because they did not yet have DNA c. Viruses evolved from RNA d. Early cells was made entirely of RNA e. Proteins may not have been necessary for the earliest biological reactions to occur
Which statement among A-D is false regarding non-retrovirus RNA viruses? A. they possess RNA-dependent RNA polymerase...
Which statement among A-D is false regarding non-retrovirus RNA viruses? A. they possess RNA-dependent RNA polymerase B. the genome of single stranded (+) RNA virus like West Nile virus, can serve directly as mRNA C. during the multiplication process inside a host cell, a single stranded (-) RNA virus must go through a (+) RNA stage before forming progeny phage D. such viruses can produce a provirus form in the host E. None of A-D is false, they are all...
15.) An oncovirus can cause uncontrolled cell growth by A. interfering with the activity of host...
15.) An oncovirus can cause uncontrolled cell growth by A. interfering with the activity of host cell cycle regulation proteins B. creating a cytocidal infection C. budding from the host cell D. causing lysogenic conversion E. none of the above, viruses cannot cause cancer MB302 FORM 1 16.) Oxygen is an excellent A. electron donor B. coenzyme C. electron carrier D. electron acceptor E. energy source For #17-20, fil nthe table using the options provided below to name the enzyme...
Which of the following statements is true? A. RNA polymerase has a proofreading activity B. Prokaryotic...
Which of the following statements is true? A. RNA polymerase has a proofreading activity B. Prokaryotic RNA usually undergoes nuclear processing C. Polypeptides are synthesized by addition of amino acids to the amino terminus. D. The 3' end of mRNA corresponds to the carboxyl terminus of the protein. Grade 2. Which of the following A. It may be autocatalytic. B. Spliceosomes are present in organelles and nuclei C. It involves removal of exons is true regarding RNA processing? D. It...
QUESTION 5 Which one of the following explains the RNA molecule the best? O A. It...
QUESTION 5 Which one of the following explains the RNA molecule the best? O A. It contains uracil in place of thymine O B. It is generally a single strand molecule O C. Its sugar is ribose O D. All of the above QUESTION 10 A form of replication in which the two parental DNA strands remain together following DNA replication is O semi-conservative O conservative o dispersive o all of the above QUESTION 11 Which of the following is...
emaining: 1:34:44 Show Time Remaining 3 of 5 - Multiple Choice Questions: Please select the best...
emaining: 1:34:44 Show Time Remaining 3 of 5 - Multiple Choice Questions: Please select the best answer that addresses each question (2 pol Question 24 of 33 2 Points Which of the following is not true about the viral reverse transcriptase? A. It can use a single stranded DNA as a template to synthesize a double stranded DNA. B. It has ribonuclease activity. C. It has an RNA-dependent DNA polymerase activity D. It has a promiscuous specificity for nucleotides. E....
13. Why are ribonucleoside triphosphates the monomers required for RNA synthesis rather than ribonucleoside monophosphates? A....
13. Why are ribonucleoside triphosphates the monomers required for RNA synthesis rather than ribonucleoside monophosphates? A. Only ribonucleoside triphosphates contain the sugar ribose. B. Ribonucleoside triphosphates have low potential energy, making the polymerization reaction endergonic. C. Ribonucleoside triphosphates have high potential energy, making the polymerization reaction exergonic. D. Ribonucleoside monophosphates cannot form complementary base pairs with the DNA template. E. Ribonucleoside triphosphates are not used, rather all use deoxyriboside triphosphates. 14. How is a mutation in a bacterial cell that...
Compared to RNA elongation by RNA polymerases, DNA elongation by DNA polymerase requires an additional reaction...
Compared to RNA elongation by RNA polymerases, DNA elongation by DNA polymerase requires an additional reaction component. Which is appropriate for fulfillment of this requirement? Select one: a. a primase is needed for the biological DNA replication. b. a short DNA primer is necessary for PCR. c. a host tRNA is used for the synthesis of DNA by viral reverse transcriptase. d. All of these e. None of these
6. The RNA World hypothesis includes the idea that: a. RNA is the most important molecule in living organisms today b. Ear;ly cells could not produce because they did not yet have DNA c. Viruses evolved from RNA d. Early cells was made entirely of RNA e. Proteins may not have been necessary for the earliest biological reactions to occur 7. In early human embryos, the gene HoxB7 is involved in patterning the central nervous system. In later embryos, the...
6. The RNA World hypothesis includes the idea that: a. RNA is the most important molecule in living organisms today b. Early cells could not produce because they did not yet have DNA c. Viruses evolved from RNA d. Early cells was made entirely of RNA e. Proteins may not have been necessary for the earliest biological reactions to occur
HELP!!! Highlighted answer is WRONG!! please help with correct
one.
6. The RNA World hypothesis includes the idea that: a. RNA is the most important molecule in living organisms today b. Early cells could not produce because they did not yet have DNA c. Viruses evolved from RNA d. Early cells was made entirely of RNA e. Proteins may not have been necessary for the earliest biological reactions to occur
15.) An oncovirus can cause uncontrolled cell growth by A. interfering with the activity of host cell cycle regulation proteins B. creating a cytocidal infection C. budding from the host cell D. causing lysogenic conversion E. none of the above, viruses cannot cause cancer MB302 FORM 1 16.) Oxygen is an excellent A. electron donor B. coenzyme C. electron carrier D. electron acceptor E. energy source For #17-20, fil nthe table using the options provided below to name the enzyme...
Which of the following statements is true? A. RNA polymerase has a proofreading activity B. Prokaryotic RNA usually undergoes nuclear processing C. Polypeptides are synthesized by addition of amino acids to the amino terminus. D. The 3' end of mRNA corresponds to the carboxyl terminus of the protein. Grade 2. Which of the following A. It may be autocatalytic. B. Spliceosomes are present in organelles and nuclei C. It involves removal of exons is true regarding RNA processing? D. It...
QUESTION 5 Which one of the following explains the RNA molecule the best? O A. It contains uracil in place of thymine O B. It is generally a single strand molecule O C. Its sugar is ribose O D. All of the above QUESTION 10 A form of replication in which the two parental DNA strands remain together following DNA replication is O semi-conservative O conservative o dispersive o all of the above QUESTION 11 Which of the following is...
emaining: 1:34:44 Show Time Remaining 3 of 5 - Multiple Choice Questions: Please select the best answer that addresses each question (2 pol Question 24 of 33 2 Points Which of the following is not true about the viral reverse transcriptase? A. It can use a single stranded DNA as a template to synthesize a double stranded DNA. B. It has ribonuclease activity. C. It has an RNA-dependent DNA polymerase activity D. It has a promiscuous specificity for nucleotides. E....
13. Why are ribonucleoside triphosphates the monomers required for RNA synthesis rather than ribonucleoside monophosphates? A. Only ribonucleoside triphosphates contain the sugar ribose. B. Ribonucleoside triphosphates have low potential energy, making the polymerization reaction endergonic. C. Ribonucleoside triphosphates have high potential energy, making the polymerization reaction exergonic. D. Ribonucleoside monophosphates cannot form complementary base pairs with the DNA template. E. Ribonucleoside triphosphates are not used, rather all use deoxyriboside triphosphates. 14. How is a mutation in a bacterial cell that...
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