Explanation

A virus is an obligate intracellular parasite. 

Obligate intracellular parasite:

This means a virus must live inside a host cell to replicate and survive.

Viruses lack the necessary machinery to produce proteins or generate energy on their own, so they rely on the host cell's resources. 

Explanation

Kinetic energy formula: KE = ½ mv²

Let initial KE = ½ * m * v²  

New KE = ½ * (3m) * (2v)²  

= ½ * 3m * 4v²  

= 6mv²  

Now divide new KE by original KE:  

(6mv²) / (½mv²) = 12 times

Explanation

The correct answer is:  All of the above

A complete revolution corresponds to an angular displacement of:

• 360°

• $2\pi$ radians

So, for 2 complete revolutions:

• Degrees: $2\times 360°=720°$

• Radians: $2 times 2pi = 4pi$ radians

• Approximate radians:

  $$4\pi \approx 4\times 3.14=12.56\text{ radians (rounded to 12.6)}$$

Explanation

Hemophilia is a sex-linked genetic disorder

Because the gene responsible for its development is located on the X chromosome.

Since males only have one X chromosome, they are more likely to be affected by the disorder if they inherit a mutated copy of the gene. Females, with two X chromosomes, can be carriers if they have one mutated copy but still express the normal phenotype due to their other X chromosome. 

Explanation

 According to Gauss's Law, the net electric flux through a closed surface depends on the net charge enclosed.

If equal and opposite charges are present inside the surface, their total is zero, so the net electric flux is also zero.

Explanation

Sodium chloride (NaCl) forms ionic bonds, which are considered the strongest type of bonding in solids.

These bonds involve a strong electrostatic attraction between positively charged sodium ions (Na+) and negatively charged chlorine ions (Cl-).

This results in a stable crystal lattice structure, requiring a significant amount of energy to overcome and melt the compound. 

Explanation

At room temperature, H₂ (hydrogen) has the lowest density among Ne (neon), N₂ (nitrogen), and CO (carbon monoxide). 

Density is directly proportional to molar mass, meaning the gas with the lowest molar mass will have the lowest density.

Hydrogen has the lowest molar mass among the listed gases, making it the least dense. 

Explanation

In the 3d series of the periodic table, melting and boiling points generally increase up to the middle,

Reaching a peak around elements like Chromium (Cr), and then decreasing towards the end of the series, with Zinc (Zn) having the lowest melting point. 

Explanation

Iodine is solid due to its high polarizability. 

Iodine is a solid at room temperature due to the strong intermolecular forces present between its molecules, specifically London dispersion forces

These forces arise from the large size and high polarizability of iodine atoms.

Larger atoms like iodine have more electrons, which are easier to distort, leading to stronger attractive forces between molecules.

This allows iodine molecules to stick together in a solid state

Explanation

nsulin is produced by the pancreas, which is an organ located behind the stomach.

The pancreas contains clusters of cells called the Islets of Langerhans, specifically the beta cells within these islets, which are responsible for producing insulin.

Insulin plays a crucial role in regulating blood sugar levels by facilitating the uptake of glucose into cells for energy production or storage.

When blood sugar levels rise after a meal, the pancreas releases insulin to help lower blood sugar levels by promoting the uptake of glucose into cells.