Explanation

Nitrogen makes up about 3% of the human body by mass.

It is mostly found in proteins, DNA, and RNA.

It is essential for building amino acids and nucleic acids in the body.

Explanation

Bizarre means بہت غیر معمولی یا عجیب

Strange means کچھ ناواقف یا غیر متوقع

Explanation

 "Screamed" means to yell or cry out loudly, often due to fear, anger, or excitement.

The best synonym is Yelled چیخنا

Explanation

The steroid hormones are synthesized in the :

the adrenal cortex,

the gonads,

and the placenta

The steroid hormones are all derived from cholesterol and many are of clinical importance

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Cholesterol is the fundamental building block for all other steroids in the body.

Cholesterol is also the precursor of other important: steroid metabolites including bile salts and steroid hormones.

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ND11-12-2022

Explanation

In Ascidian embryos, the grey crescent gives rise to the notochord. 

The gray crescent:

• In ascidian development, the gray crescent is a region of pigmented cytoplasm located at the posterior of the fertilized egg.
• It is important for determining the future location of the notochord and neural tube. 

Notochord formation:

• The cells derived from the gray crescent are specifically destined to form the notochord, a rod-like structure that provides structural support during development. 

Explanation

Angular frequency (ω) measures how quickly something moves through an angle in circular motion.

It's given by:

$$omega = frac{2pi}{T} = 2pi f$$

Where:

• $T$ = time period

• $f$= frequency

While it’s also used in oscillations, it is fundamentally defined from circular motion.

Explanation

Standard enthalpy change is measured at a defined pressure of 101 kPa (or 1 bar, according to Testbook.com) and a temperature of 298 K (25°C). 

Explanation

The S-block includes Group 1 (alkali metals) and Group 2 (alkaline earth metals) along with helium, totaling 14 elements.

These elements have their outermost electrons in the s-orbital.

Additional Information:

P-block → 6 groups (13–18) → 38 elements

D-block → Transition metals (Groups 3–12) → 40 elements

F-block → Lanthanides + Actinides → 28 elements

Explanation

Appreciable means نوٹ کرنے یا ناپنے کے لیے بڑے یا کافی اہم

Measurable means نوٹ کرنے یا ناپنے کے لیے بڑے یا کافی اہم

Explanation

The correct unit of the rate constant for a zero-order reaction is mol dm⁻³ s⁻¹ or mol L⁻¹ s⁻¹.