Biology class 12 first chapter MCQs

Qno.1 What is the estimated no. of cells that the human body is composed

of?

Ans: 37.2 trilion

Qno. 2 What is the amount of blood contains in the human body?

Ans: 5-6 litres.

Qno.3 With how many bones the human skeletal system is composed of in

adult age?

Ans: 206

Qno. 4 What is the largest organ in the human body?

Ans: skin

Qno. 5 What is the largest gland?

Ans: liver

Qno.6 How many blood groups in the ABO system?

Ans: 4

Qno.6 How many chambers in the human heart?

Ans: 4

Qno. 8 What is the average blood pressure of human being?

Ans: 120/80 mmHg

Qno.9 What is the weight of the brain?

Ans: 1.36 kg

Qno.10 Which part of the brain controls anger, fear, body temperature?

Ans: hypothalamus

Qno.11 Which part occupies 80% of the brain?

Ans: cerebram

Qno.12 what is the function of retina?

Ans: to create reflection of an image

Qno.13 what is the master gland of the body?

Ans: pituitary gland

Qno.14 what is the amount of urine that a healthy human passes each day?

Ans: 1500 ml

Qno.15 what is the Ph of urine?

Ans: 6

Qno.16 what is the weight of heart in an average human being?

Ans: 300 gm

Qno.17 what is the covering of heart?

Ans: pericardium

Qno.18 How many ribs in the human thorax?

Ans: 12 pairs

 

Qno.19 What is the percentage of calcium stored in the bones?

Ans: 97%

Qno.20 Which acid is secreted from stomach?

Ans: HCl

Qno.21 What is the amount of gastric juice secreted from stomach daily?

Ans: 2 litres

Qno.22 What is the mixed gland of the human body?

Ans: pancreas

Qno.23 What is the function of thrombocyte?

Ans: hemostasis

Qno.24 Who invented human blood grouping system?

Ans: Carl Landsteiner

Qno.25 What kind of blood is carried through artery?

Ans: oxygenated blood

Qno.26 What is the function of hemoglobin?

Ans: transport oxygen

Qno.27 Who invented Insulin?

Ans: Edward Sharpy Schafer