ashLine t 2-BSCI-30050-4 6. Expression of myostatin is increased in people with
ID: 209636 • Letter: A
Question
ashLine t 2-BSCI-30050-4 6. Expression of myostatin is increased in people with AIDS who have lost a lot of weight and decreased in people who have done a lot of strength training. These expression patterns reflect the fact that a. myostatin mutations cause AIDS and strength training can lessen the infection's effects. b. too much myostatin compensates for AIDS-related weight loss, and builds muscles in strength trainers c. too much myostatin decreases muscle mass, and too litle causes muscle overgrowh. d. people with AlDS have duplications of the myostatin gene. e. muscle stem cells activate synthesis of myostatin protein. 7. Which of the following types of mutations in the myostatin gene could cause a double-muscle phenotype? a. a deletion b. a nonsense mutation c. a splice site mutation d. a point mutation e any the above A double muscle breed of cattle called Piedmontese has a mutation that replaces a G with an A in the mRNA, which alters a cysteine to a tyrosine in the amino acid sequence (see Figure 7 in the next section). Codon changes that could cause this amino acid change are 8. a. UGU to UAU or UGO to UAC b. UAU to UGU or UAC to UGC e UGiU to UGC or UAU to UAC d. UGC to UGU or UAC to UAU UGA to UAA or UGG to UAG The myostain mucation io Piedmontese cattcExplanation / Answer
Answer 6:
C is the correct answer i.e too much myostatin decrease muscle mass and too little causes muscle overgrowth.
Answer 7 :
E is the correct answer i.e any of the above
Answer 8
A is the answer i.e UGU to UAU or UGC to UAC.
Answer 9
The myostatin mutation in peidmontese cattle is missense and transition, so B is the right answer.
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