The type of nucleotides present in a DNA molecule are:
A) 3
B) 4
C) 5
D) 6
Explanation: DNA is made up of four building blocks called nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C). The nucleotides attach to each other (A with T, and G with C) to form chemical bonds called base pairs, which connect the two DNA strands.
Drass is alloy of:
A) Zinc and iron
B) Zinc and copper
C) Copper and gold
D) Zinc and gold
Explanation: Bronze (copper–tin alloy) and brass (copper–zinc alloy) are the two most extensively used copper alloys.
The atmosphere is made up of.
A) Two layers
B) Four layers
C) Five layers
D) Seven layers
Explanation: Earth’s atmosphere has five major and several secondary layers. From lowest to highest, the major layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere.
Recreational purposes of water include:
A) Swimming
B) Rafting
C) Boating
D) All of these
Which one of the following is not a form of energy?
A) Lamp
B) Sound
C) Light
D) Heat
The example of Non Luminous object include:
A) Bulb
B) Sun
C) Moon
D) None of these
Explanation: Luminous objects are which emit light by their own.
Examples: - Sun, flame of a burning candle
Non-luminous objects are which can not emit light on their own. These objects reflect light from luminous bodies
Examples: - Moon, Earth
