What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?
75 beats per minute
100 beats per minute
125 beats per minute
50 beats per minute
B.
100 beats per minute
Cardiac output = stroke volume × Heart rate
Cardiac output = 5L or 5000 mL
Blood volume in ventricles at the end of diastole = 100 mL
Blood volume in ventricles at the end of systole = 50 mL
Stroke volume = 100 - 50 = 50 mL
So, 5000 mL = 50 mL × Heart rate
Therefore, heart rate is 100 beats per minute.
Match the following structures with their respective location in organs
| A. Crypts of Lieberkuhn | (i) Pancreas |
| B. Glisson's Capsule | (ii) Duodenum |
| C. Islets of Langerhans | (iii) Small intestine |
| D. Brunner's Glands | (iv) Liver |
Select the correct option from the following
A - (ii); B - (iv); C - (i); D - (iii)
A - (iii); B - (iv); C - (i); D - (ii)
A - (iii); B - (ii); C - (i); D - (iv)
A - (iii); B - (i); C - (ii); D - (iv)
Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by
Hexokinase
Enolase
Phosphofructokinase
Aldolase
Xylem translocates
Water and mineral salts only
Water, mineral salts and some organic nitrogen only
Water, mineral salts, some organic nitrogen and hormones
Water only
Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus
Mangifera indica Linn.
Mangifera indica
Mangifera Indica
Mangifera indica Car. Linn
Consider the following statement :
(A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group.
(B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme.
Select the correct option.
(A) is true but (B) is false.
Both (A) and (B) are false
(A) is false but (B) is true
Both (A) and (B) are true.
Which of the following pair of organelles does not contain DNA?
Chloroplast and Vacuoles
Lysosomes and Vacuoles
Nuclear envelope and Mitochondria
Mitochondria and Lysosomes
The shorter and longer arms of a submetacentric chromosome are referred to as
p-arm and q-arm respectively
q-arm and p-arm respectively
m-arm and n-arm respectively
s-arm and l-arm respectively
Consider following features
(a) Organ system level of organisation
(b) Bilateral symmetry
(c) True coelomates with segmentation of body
Select the correct option of animal groups which possess all the above characteristics
Annelida, Arthropoda and Mollusca
Arthropoda, Mollusca and Chordata
Annelida, Mollusca and Chordata
Annelida, Arthropoda and Chordata
Match the Column-I with Column-II
| Column I | Column II |
| A. P-wave | (i) Depolarisation of ventricles |
| B. QRS complex | (ii) Repolarisation of ventricles |
| C. T-wave | (iii) Coronary ischemia |
| D. Reduction in the size of T-wave |
(iv) Depolarisation of atria (v) Repolarisation of atria |
Select the correct option.
A - (iv); B - (i); C - (ii); D - (v)
A - (ii); B - (i); C - (v); D - (iii)
A - (ii); B - (iii); C - (v); D - (iv)
A - (iv); B - (i); C - (ii); D - (iii)
