Nucleus is absent in

• Erythrocyre (Red Blood Cell)
• Cancer cell
• Stem cell
• Leucocyte (White Blood Cell)
Correct Option: A  [ Erythrocyre (Red Blood Cell) ]

Remark:

Which of the following lenses would you prefer to read small letters in a dictionary ?

• A convex lens of focal length 50 cm
• A concave lens of focal length 50 cm
• A convex lens of focal length 5 cm
• A concave lens of focal length 5 cm
Correct Option: C  [ A convex lens of focal length 5 cm ]

Remark:

Tetraethyl lead (TEL) is

• a catalyst used in burning fossil fuel
• an antioxidant
• a reductant
• an antiknock compound
Correct Option: D  [ an antiknock compound ]

Remark:

"Curie" is unit of:

• Radioactivity
• Temperature
• Heat
• Energy
Correct Option: A  [ Radioactivity ]

Remark: Curie (Ci): One of three units used to measure the intensity of radioactivity.
The original unit for measuring the amount of radioactivity was the curie (Ci)–first defined to correspond to one gram of radium-226.

Yellow revolution is related to:

• cereals
• oilseeds
• milk
• none of these
Correct Option: B  [ oilseeds ]

Remark:

The "powerhouse" of cell is:

• Nucleus
• Lysosome
• Mitochondria
• DNA
Correct Option: C  [ Mitochondria ]

Remark: Mitochondria are membrane-bound cell organelles that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate (ATP).

In which part of the human body carpal bones are found ?

• Wrist
• Femur
• Neck
• None of these
Correct Option: A  [ Wrist ]

Remark:

Living in the atmosphere of CO is dangerous because it:

• Reduces organic matter of tissues
• Dries up the blood
• Combined with O₂ present inside to form CO₂
• Combines with haemoglobin and makes it incapable of absorbing oxygen
Correct Option: C  [ Combined with O₂ present inside to form CO₂ ]

Remark:

Under critical temperature, on compressing gases turn to liquid, because:

• molecules are of finite size.
• molecules have random motion.
• molecules have inter-molecular forces.
• molecules are spherical.
Correct Option: C  [ molecules have inter-molecular forces. ]

Remark:

"Athlete's foot" is:

• a specific footwear for athletes to prevent them from straining their feet
• an allergic skin rash
• a common fungal infection that attacks the skin below the toes
• an eczema
Correct Option: C  [ a common fungal infection that attacks the skin below the toes ]

Remark: