Homework Answers
Ans14. to generate mutations
X-rays are electromagnetic radiations and ionising rays that are used to generate mutations.
Ans19. increase mRNA stability
Poly A tail at 3' end of mRNA, protects mRNA from degradation. Hence, increases its stability.
Poly A tail is not encoded by DNA and is template independent. Also, this does not allow mRNA to be transcribed in reverse direction. Therefore, these statements are false.
Ans20. 2,1
Exons are the regions in genome that are expressed therefore, they would be present in RNA and also, RNA is complementary to DNA. Hence, only these regions will pair with DNA.
From the question, at 2 regions pairing is seen so, these two regions are exons and one region that does not pair is intron as this is not present in RNA because it is not expressed.
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Question 14 The Beadle and Tatum experiment manipulating a metabolic pathway in the mold Neurosporo used...
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...
Please help with 1-16!!! (two pictures are attached) Thanks! Transcription . Although both prokaryotes and eukaryotes...
Please help with 1-16!!! (two pictures are attached) Thanks!
Transcription . Although both prokaryotes and eukaryotes put a cap and a tail on the mRNA, only eukaryotes have introns that have to be spliced out. (T/F) 2. The poly A tail on cukaryotic mRNA protects the RNA from rapid degradation in the cytoplasm. (T/F) 3. The polyA tail is added to eukaryotic mRNA immediatel after transport of the message from the nucleus. (T/F) 4. is usually a single stranded molecule....
allll pleas Question 14 (1 point) Eukaryotes modify a primary RNA transcript to generate a final...
allll pleas
Question 14 (1 point) Eukaryotes modify a primary RNA transcript to generate a final mRNA product. Which of the following modifications is something that occurs to eukaryotic RNA (which one is correct): OA) removing exons from the transcript B) adding introns into the transcript C) adding a poly(A) tail to the transcript by poly(A) polymerase OD) adding start codons to the transcript after its synthesis E) removing a 5' cap from the transcript Question 18 (1 point) Origins,...
5 pts Question 23 Life on Earth uses 3 nucleotide long code words, with 4 letters...
5 pts Question 23 Life on Earth uses 3 nucleotide long code words, with 4 letters in the alphabet to encode 20 amino acids. DNA on the planet Arth only contains A, G and C. In addition, proteins on Arth are made from 26 different amino acids. What is the minimum number of nucleotides in a codon needed to code for life on Arth? Hint: In humans a 3-letter code can represent 4 x 4 x4 = 64 amino acids...
please answer all the questions right. J. TIIS IS 18 Pelresh your memory on what you...
please answer all the questions right.
J. TIIS IS 18 Pelresh your memory on what you knew well and what you ne ork more on. It also is preparation for a review of all of the practice questions from unit 3, which is due Mon ay want to work on these quizzes together, or use this quiz to guide your studying and the old question revie onday to assess your studying. D l Question 1 0.2 pts (LO 15.7) How...
Question 2: a) You determine that xpd is expressed preferentially in muscle. Your colleague wants to...
Question 2:
a)
You determine that
xpd
is expressed preferentially in muscle. Your colleague wants to
know
if any of the mutations affect the stability of the RNA
transcript, thereby leading to higher
turnover and lower overall mRNA levels. What techniques could
you use to test her
hypothesis? List the pros and cons of each method. (hint: try to
think of at least three methods
you could use)
b) You find that your collegue is correct, and that the xpda...
Please help with 1-16!!! (two pictures are attached) Thanks!
Transcription . Although both prokaryotes and eukaryotes put a cap and a tail on the mRNA, only eukaryotes have introns that have to be spliced out. (T/F) 2. The poly A tail on cukaryotic mRNA protects the RNA from rapid degradation in the cytoplasm. (T/F) 3. The polyA tail is added to eukaryotic mRNA immediatel after transport of the message from the nucleus. (T/F) 4. is usually a single stranded molecule....
allll pleas
Question 14 (1 point) Eukaryotes modify a primary RNA transcript to generate a final mRNA product. Which of the following modifications is something that occurs to eukaryotic RNA (which one is correct): OA) removing exons from the transcript B) adding introns into the transcript C) adding a poly(A) tail to the transcript by poly(A) polymerase OD) adding start codons to the transcript after its synthesis E) removing a 5' cap from the transcript Question 18 (1 point) Origins,...
5 pts Question 23 Life on Earth uses 3 nucleotide long code words, with 4 letters in the alphabet to encode 20 amino acids. DNA on the planet Arth only contains A, G and C. In addition, proteins on Arth are made from 26 different amino acids. What is the minimum number of nucleotides in a codon needed to code for life on Arth? Hint: In humans a 3-letter code can represent 4 x 4 x4 = 64 amino acids...
please answer all the questions right.
J. TIIS IS 18 Pelresh your memory on what you knew well and what you ne ork more on. It also is preparation for a review of all of the practice questions from unit 3, which is due Mon ay want to work on these quizzes together, or use this quiz to guide your studying and the old question revie onday to assess your studying. D l Question 1 0.2 pts (LO 15.7) How...
Question 2:
a)
You determine that
xpd
is expressed preferentially in muscle. Your colleague wants to
know
if any of the mutations affect the stability of the RNA
transcript, thereby leading to higher
turnover and lower overall mRNA levels. What techniques could
you use to test her
hypothesis? List the pros and cons of each method. (hint: try to
think of at least three methods
you could use)
b) You find that your collegue is correct, and that the xpda...
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