Explanation

The enzyme that synthesizes DNA,

DNA polymerase can only add nucleotides to an already existing strand or primer of DNA or RNA that is base paired with the template.

ND5-07-2023

Explanation

Silicon is an element found in glass, cement, China Clay and Quartz. 

Silicon is a chemical element with the symbol Si and atomic number 14.

MUG 10-12-2022

ND5-07-2023

Explanation

Diamond is composed of the single element carbon, 

 it is the arrangement of the C atoms in the lattice that give a diamond amazing properties.

MUG 11-12-2022

ND5-07-2023

Explanation

Biotechnology can also be employed to develop functional foods with health-promoting properties

and to reduce food waste while promoting sustainability in food production.

Additives, enzyme processing, and fermentative processes are key techniques

that can be used to improve food quality and shelf life.

ND5-07-2023

Explanation

AB-positive blood type is known as the “universal recipient” because AB-positive patients can receive red blood cells from all blood types.

The blood group system was discovered by Austrian physician Karl Landsteiner in 1901.

He identified the ABO blood group system,

ND5-07-2023

Explanation

Sir Isaac Newton's three law of motions

In 1686, he presented his three laws of motion in the “Principia Mathematica Philosophiae Naturalis.”

In the first law, an object will not change its motion unless a force acts on it.

In the second law, the force on an object is equal to its mass times its acceleration.

In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

ND5-07-2023

Explanation

Answer: 

C: Heating of Mercuric oxide powder: The heating of Mercuric oxide powder is a permanent change. We cannot get powder by revere reaction so it is a chemical change

Sublimation of Iodine: It is a physical change

Heating a platinum wire in a Bunsen flame: Platinum is a noble gas that cannot change its physical appearance after heating. So it is not a chemical change

Evaporation of Alcohol: It is a physical change. The liquid is changed into gas 

Explanation

Zoology is derived from two Greek words; Zoo means an animal, and Logos means to study.

Explanation

The density of water depends on temperature and salt content. Density is measured as mass (g) per unit  volume (cc). Water has the highest density at 3.98 ° C and the lowest density at 0 ° C (freezing point).

Explanation

Highest levels of vitamin C are found  in Black currants & guava