Biology MCQs:

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"It is hard to fail, but it is worse never to have tried to succeed."

― Theodore Roosevelt

Science-Biology-Multiple Choise Questions and Answers

প্রতিটি প্রশ্নের জন্য চারটি করে উত্তর থাকবে যার একটি সঠিক, বামদিকে A, B, C এবং D এর উপর ক্লিক করে সঠিক উত্তরটি দেখতে পারেন। যদি উত্তর সঠিক হয় তবে অপশনটির ডান দিকে টিক () আর উত্তর ভূল হলে ক্রস () চিনহ প্রদ্ররশিত হবে।

# 1. Scientists discovered the HIV (human immunodeficiency virus) that causes AIDS in______.

A.

1977

B.

1986

C.

1980

D.

1983

# 2. which of the following efficiently carries oxygen from the lungs to the tissues of the body?

A.

insulin

B.

hemoglobin

C.

immunoglobulin

D.

amino acid

# 3. Malaria is a mosquito-borne infectious disease of humans and other animals caused by______.

A.

Virus

B.

Protozoa

C.

Fungus

D.

Bacteria

# 4. Which of the following is the main source of nutrition for plants?

A.

Soil

B.

Chlorophyll

C.

Air

D.

Sunlight

# 5. what is the only natural source of quinine?

A.

herbs meadowsweet

B.

willow bark

C.

green leaf

D.

cinchona

# 6. Plants absorb nitrates from the soil and use these to build up_______.

A.

Urea

B.

proteins

C.

Ammonia

D.

Phosphate

# 7. what is the percentage of carbon dioxide in the air?

A.

78.09%

B.

20.95%

C.

0.93%

D.

0.039%

# 8.Both RNA and DNA are_________.

A.

nucleic acids

B.

amino acids

C.

hormones

D.

chromosome

# 9. What is the name of the fungtional unit of the kidney?

A.

Nephritis

B.

Nephron

C.

Lymph

D.

Neuron

# 10. The leaves contain a pigment called__________, which colors the leaves green.

A.

chromosome

B.

chromoplast

C.

chlorophyll

D.

chlorine

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