Explanation

Most proteins are made up of 20 different amino acids.

These 20 amino acids are commonly referred to as the standard or proteinogenic amino acids.

While other amino acids exist, they are not typically found in the primary structure of proteins that make up most living organisms.

Explanation

I buried him two days ago.

The phrase “two days ago” clearly indicates a specific time in the past, so we must use the simple past tense.

"Buried" is the simple past form of the verb "bury."

Explanation

 While an electron always has an electric field due to its charge, its spin generates a magnetic field.

The motion of a charged particle (even if it's just spinning) creates a magnetic field.

Explanation

 Gram-positive bacteria stain purple or blue with the Gram stain.

This is due to their thick peptidoglycan cell wall, which retains the primary stain (crystal violet) even after decolorization. 

Explanation

This refers to the loss of water through the cuticle, the waxy layer on the surface of leaves. 

Sources consistently state that approximately 5-7% of total transpiration occurs via the cuticle. 

Explanation

The empirical formula of glucose is CH2O.

This represents the simplest whole-number ratio of the elements in glucose.

It has a molecular formula of C6H12O6.

Explanation

The average translational kinetic energy of a molecule in an ideal gas is given by the formula:

E=3/2​kT

Where:

• $k = 1.38 times 10^{-23} , text{J/K}$ (Boltzmann constant)

• T=27∘C=300K (since 27°C + 273 = 300 K)

Now calculate:

E=3​/2×1.38×10^−23×300
E=3/2​×4.14×10^−21

6.21×10^−21 J

Explanation

At the center of the Earth, gravitational forces from all directions cancel out.

Hence, the net gravitational force (and weight) is zero.

Explanation

Horizontal range in projectile motion is directly proportional to time of flight when speed is constant.

So, doubling the time results in double the distance covered.

Explanation

In C language, printf() function is used to print formatted output to the standard output stdout (which is generally the console screen).

The printf function is a part of the C standard library and it can allow formatting the output in numerous ways.