Free Body Fluids And Circulation (Daily Quiz: 7) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

The QRS complex in a standard ECG represents

(a) depolarisation of auricles

(b) repolarisation of auricles

(c) depolarisation of ventricles

(d) repolarisation of ventricles

Question-2

Which of the following is not the main function of lymph glands?

(a) Forming RBCs

(b) Forming WBCs

(c) Destroying bacteria

(d) Forming antibodies

Question-3

Serum differs from blood in

(a) lacking albumins

(b) lacking globulins

(c) lacking clotting factors

(d) lacking antibodies

Question-4

Doctors use stethoscope to hear the sounds produced during each cardiac cycle. The second sound is heard when

(a) AV valves open up

(b) AV node receives signal from SA node

(c) Ventricular walls vibrate due to gushing in of blood from atria

(d) Semilunar valves close down after the blood flows into vessels from ventricles

Question-5

There is no DNA in

(a) mature RBCs

(b) hair root

(c) a mature spermatozoan

(d) an enucleated ovum.