SSC CHSL Biology Questions with Answers & Explanations

Which blood cells fight infection?

1. ARed blood cells
2. BPlasma proteins
3. CPlatelets
4. DWhite blood cells

Photosynthesis takes place in the

1. AVacuole
2. BNucleus
3. CMitochondria
4. DChloroplast

Dengue is transmitted by the

1. ASandfly
2. BAedes mosquito
3. CCulex mosquito
4. DAnopheles mosquito

Deficiency of Vitamin D causes

1. AScurvy
2. BPellagra
3. CBeriberi
4. DRickets

The longest bone in the human body is the

1. AHumerus
2. BFemur
3. CTibia
4. DFibula

The largest organ of the human body is the

1. ALungs
2. BLiver
3. CSkin
4. DHeart

The smallest bone in the human body is the

1. AFemur
2. BRadius
3. CIncus
4. DStapes

The functional unit of the kidney is the

1. AAlveolus
2. BVillus
3. CNeuron
4. DNephron

How many chambers does the human heart have?

1. AThree
2. BFour
3. CFive
4. DTwo

Malaria is caused by

1. APlasmodium
2. BA bacterium
3. CA fungus
4. DA virus

Deficiency of iodine causes

1. ARickets
2. BScurvy
3. CAnaemia
4. DGoitre

The functional unit of the nervous system is the

1. ANeuron
2. BNephron
3. CSynapse only
4. DAxon only

The universal blood recipient group is

1. AB positive
2. BA negative
3. CAB positive
4. DO negative

Deficiency of Vitamin A causes

1. AScurvy
2. BNight blindness
3. CRickets
4. DAnaemia

The normal human body temperature is about

1. A37 °C
2. B40 °C
3. C39 °C
4. D35 °C

The universal blood donor group is

1. AAB positive
2. BO negative
3. CA positive
4. DB negative

Malaria is spread by the female

1. AAnopheles mosquito
2. BAedes mosquito
3. CHousefly
4. DCulex mosquito

Penicillin was discovered by

1. AAlexander Fleming
2. BRobert Koch
3. CEdward Jenner
4. DLouis Pasteur

Which part of the plant carries water from roots to leaves?

1. ACambium
2. BXylem
3. CStomata
4. DPhloem

How many bones are there in an adult human body?

1. A196
2. B212
3. C208
4. D206