Class 8th Science MCQs - Home of Knowledge

Class 8th Science MCQs

Class 8th Science MCQs

The unit of nervous system is_________

A) Neuron

B) Nephron

C) Hormone

D) Both A and B

 

The collection of neuron cell bodies is called grey matter_______

A) White matter

B) Grey matter

C) Spinal cord

D) Nerve cells

 

The collection of axons is called_______

A) White matter

B) Grey matter

C) Myelin sheath

D) Red matter

 

 

The colour of white matter is due to __________

A) Myelin sheath

B) Cell bodies

C) Break down of neurons

D) All of the above

 

Sudden response to a stimulus is called ______

A) Pseudo response

B) Voluntary response

C) Refractive index

D) Reflex action

 

Kidney play role in removal of ______

A) Carbon dioxide

B) Oxygen

C) Salts

D) Undigested food

 

Organ of homeostasis is_______

A) Brain

B) Spinal Cord

C) Kidney

D) Ear

 

 

Diabetes is excess of _______ in blood

A) Oxygen

B) Carbon dioxide

C) Salts

D) Glucose

 

 

For removal of stone following is used

A) Use of excess water

B) Lithotripsy

C) Surgery

D) All of the above

 

Average weight of man brain is _______

A) 0.8 Kg

B) 28 kg

C) 1.7 Kg

D) 1.9 kg

 

Homeostasis is _____

A) The regulation of water, minerals, and temperature inside the body

B) The digestion of fats in the body

C) Transport of materials in the body of living organisms

D) Phenomenon by which animals Taking in oxygen and letting out carbon dioxide

 

There are _____ types of neurons.

A) 3

B) 5

C) 6

D) 8

 

Neuron is the functional unit of _____

A) Kidney

B) Lungs

C) Nervous system

D) Respiratory system

 

Movement of digestive tract is ______

A) Involuntary action

B) Voluntary action

C) Pulmonary action

D) Harmful action

 

Urinary bladder can store up to _____ of urine. 

A) Half liter

B) 1 liter

C) 200 ml

D) 100 ml

 

First artificial kidney was developed by ____ in 1913

A) Abel, Rountee and Turner

B) Dr. Abdul Qadeer Khan

C) Maxwell, Brown and Jacob

D) All of the above

 

The cleaning of patient blood artificially with the help of a machine is called ____

A) Purification

B) Sedimentation

C) Filtration

D) Dialysis

 

Urea is a waste product produced by break down of ____

A) Glucose

B) Carbohydrates

C) Proteins

D) Enzymes

 

How many parts human brain has?

A) 2

B) 3

C) 5

D) 7

 

 

Which one regulate breathing?

A) Pons

B) Thalamus

C) Medulla

D) Hypothalamus

 

Reflex actions occurs with the help of …….

A) Heart

B) Cerebrum

C) Liver

D) Spinal cord

 

Kidneys eliminate wastes by filtering _____

A) Blood

B) Water

C) Urine

D) Bile

 

There ____ pairs of spinal nerves.

A) 20

B) 30

C) 31

D) 33

 

Filtering of blood takes place in ______

A) Neuron

B) Capillaries

C) Nephron

D) Axon

 

Major organ of the excretory system is _____

A) Kidney

B) Intestine

C) Heart

D) Stomach

 

Neurons which carry impulses from receptors to CNS are called ______

A) Motor

B) Inter neuron

C) Sensory

D) All of the above

 

In mitosis a parent cell divide into ____

A) 2

B) 3

C) 4

D) 5

 

In meiosis parent cell produce ____ daughter cells.

A) 2

B) 3

C) 4

D) 5

 

Which one is incorrect about mitosis?

A) Parent cell divide into two

B) Occur in somatic cells.

C) Occur in gametes

D) Chromosomes remain the same in daughter cells

 

A typical human chromosome contains _____ million nucleotides in its DNA.

A) 1

B) 200

C) 140

D) 780

 

Conversion of a cell into two new daughter cells is called____

A) Cell division

B) Cell growth

C) Cell death

D) Cell inheritance

 

Eukaryotic chromosomes are made up of ______

A) DNA

B) Proteins

C) DNA and Proteins

D) None of the above

 

The organism produced by genetic engineering is called _____

A) Transgenic

B) GMOs

C) Both B and C

D) None of the above

 

Penicillin is a/an _______

A) Antibiotic

B) Enzyme

C) Hormone

D) Antigen

 

Study of heredity and transmission of characteristics is called ______

A) Physiology

B) Morphology

C) Genetics

D) Ecology

 

The branch of science deal with the use of living organisms for welfare of mankind is called ____

A) Biotechnology

B) Genetics

C) Microbiology

D) Biochemistry

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