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Home Q & A Board Biology-Related Homework Help General Biology
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dixoncsk2062 dixoncsk2062
wrote...
Posts: 514
Rep: 2 0
6 years ago
When a muscle fiber is relaxed, myosin cannot bind to actin because ____.
 
  a. ATP is not present
  b. the myosin binding site on actin is blocked
  c. the myosin head is in the wrong shape for binding
  d. the actin is in the wrong orientation for myosin binding
  e. the myosin head is 180 degrees from its attachment configuration

Question 2

In a contracted muscle, the Z lines of a sarcomere are ____.
 
  a. closer together but not overlapping
  b. further apart
  c. the same distance apart as when not contracting
  d. thicker
  e. overlapping
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wrote...
#1
6 years ago
Answer to q. 1

ANSWER: b

Answer to q. 2

ANSWER: a
dixoncsk2062 Author
wrote...
#2
6 years ago
TY
wrote...
#3
6 years ago
You're welcome
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