Explanation

Once the myosin-binding sites are exposed, and if sufficient ATP is present, myosin binds to actin to begin cross-bridge cycling.

Explanation

the given valence shell electronic configuration is 4s2 4p1.

This means that the atom has a total of 3 valence electrons, with 2 electrons in the 4s subshell and 1 electrons in the 4p subshell

2 + 1 = 3 (III-A)

would be in GroupIII-A and 3 period.

Explanation

Look carefully at the symbols at the symbols to find the pattern, and select the partner from the options given below:

A, 

B, 

C, 

D, 

Answer: D

Explanation

Explanation

There are there ions   Na^ +(Z = 11), Mg ^+2  (Z=12) and Al^ +3 (Z=13)

The number of shells is the same in all three ions such as 2 shells 

The number of electrons in all three ions is the same such as they are 10 e. So electronic configuration is also the same

The number of protons of these three ion is different due to different atomic number 

Atomic number (Z) = number of protons in the nucleus of an atom = number of electrons in a neutral atom.

atomic no. of Na is 11

atomic no. of Mg^+2 is 12

atomic no. of Al^+3 is 13

So option "D" is correct

Explanation

Hyaluronidase is an important enzyme involved in the catabolism of both hyaluronic acid and chondroitin sulfate.

The release of this enzyme from the acrosome breaks down the intercellular connections of the cumulus cells and allows sperm to penetrate between the cells to the corona layer.

Explanation

Explanation

The sun began to rise behind the mountain, casting a warm and beautiful glow across the valley.

سورج پہاڑ کے پیچھے طلوع ہونے لگا، اور وادی میں ایک گرم اور خوبصورت چمک ڈالی۔

According to the question" rise" is best to keep the meaning of " beautiful glow across the valley"

If we select "set" it means " dark across the valley" and changes the meaning of the original sentence

Explanation

CO2 is linear so its dipoles cancel.

However, since SO2 is bent, the dipoles do not cancel and the molecule is polar.

Explanation

Since the reaction order is second, the formula for t1/2=k−1[A]−10.

This means that the half-life of the reaction is 0.0259 seconds

while

For a first-order reaction, t1/2 is independent of the initial concentration of reactants.

***

The rate constant of a zero-order reaction is equal to the rate of reaction.

R: t1/2 for zero order reaction is directly proportional to the initial concentration

***

A third-order reaction is a reaction in which the rate is directly proportional to the concentration of three reacting molecules.