Answer:
\rMyosin binding to F-actin is blocked
Explanation:
Tropomyosin is a protein involved in skeletal muscle contraction and that wraps around actin and prevents myosin from grabbing it. This prevents muscle contractions until the proper signal arrives. When the nervous system tells the muscle cell to contract, calcium is released.
Answer:
POINT MUTATION (SUBSTITUTION)
Explanation:
A point mutation is that mutation which involves only one nucleotide base. Point mutation can, however, occur in different ways such as SUBSTITUTION. Substitution point mutation is that which involves the replacement of a single nucleotide base by another in a gene sequence.
This is the case in this question regarding the mutation that causes sickle cell anaemia. According to this question, Sickle cell anemia is a disease that occurs when a mutation in the base pair of the hemoglobin beta gene causes a SINGLE replacement of GLUTAMIC ACID (Glu) by VALINE (Val). This shows that it is a type of SUBSTITUTION POINT MUTATION.
Answer:
no
Explanation:
protons have a positive charge and neutron does not have any charge. both proton and neutron are situated in the. nucleus
Answer:
The correct answer is:
The two layers of the plasma membrane are identical.
Explanation:
The plasma membrane is called a lipid bilayer because it is composed of two layers of cells and it makes the boundary of cell.
The other three statements are false because
Plasma membrane is semipermeable i.e it allows the transport of materials inside and outside the cell.
The proteins in the plasma membrane are integral proteins
The proteins in the plasma membrane are extensively folded and protruding from the membrane are in contact with inside and outside the cell.
Answer:
4.97097mi
Explanation:
1 km is equivalent to 0.621371mi
8 multiplied by 0.621371= 4.97097
