41.

Match the sub-stage of prophase I of meiosis in Column I and the events in Column II and choose the right option.

Column I	Column II
A. Leptotene	1. Terminalization of chiasma
B. Zygotene	2. Crossing over and recombination
C. Pachytene	3. Synapsis
D. Diakinesis	4.  Visibility of chromosomes

• A - 1; B - 2; C - 3; D - 4

• A - 1; B - 3; C - 2; D - 4

• A - 4; B - 3; C - 2; D - 1

• A - 4; B - 1; C - 2; D - 3

• A - 4; B - 1; C - 2; D - 3

Which of the following scientists discovered the triple helical structure of collagen?

• G.N. Ramachandran

• Anton von Leeuwenhoek

• Matthias Schleiden

• Theodor Schwann

• Theodor Schwann

One type of chromosome has middle centromere whereas
the other has a terminal centromere. They are

• Metacentric and acrocentric

• Metacentric and telocentric

• Sub-metacentric and telocentric

• Telocentric and acrocentric

• Telocentric and acrocentric

Match Column I with Column II and Column III. Choose the correct option.

• 1-A-i; 2-C-ii; 3-B-iii; 4-D-iv

• 1-D-i; 2-A-ii; 3-B-iii; 4-C-iv

• 1-C-i; 2-A-iii; 3-D-ii; 4-B-iv

• 1-C-i; 2-A-ii; 3-D-iii; 4-B-iv

• 1-C-i; 2-A-ii; 3-D-iii; 4-B-iv

Choose the wrong statement among the following

• Trypsinogen is activated by enterokinase

• The optimum pH for salivary amylase activity is 8.9

• Rennin helps in the digestion of milk proteins

• Goblet cells secrete mucous 8.9

• Goblet cells secrete mucous 8.9

To generate pressure gradients to facilitate expiration and inspiration, the human body uses the intercostal muscles and

• alveolar sacs

• bronchi

• primary, secondary and tertiary bronchioles

• diaphragm

• diaphragm

Choose the wrong statement

• Solubility of CO₂ in blood is 20-25 times higher than that of O₂

• The total volume of air accommodated in the lungs at the end of a forced inspiration is called the vital capacity

• O₂ can bind with haemoglobin in a reversible manner to form oxyhaemoglobin

• Every 100 ml of deoxygenated blood delivers approximately 4 ml of CO₂ to the alveoli

• Every 100 ml of deoxygenated blood delivers approximately 4 ml of CO₂ to the alveoli

Match Column I with Column II regarding human excretory system. Choose the correct option.

• i - C; ii - B; iii - A; iv - D; v - E

• i - E; ii - A; iii - B; iv - C; v - D

• i - D; ii - C; iii - B; iv - E; v - A

• i - D; ii - E; iii - A; iv - B; v - C

• i - D; ii - E; iii - A; iv - B; v - C

Thrombokinase is associated with

• elimination of urea and other excretory products from the body

• production of erythrocytes from the bone marrow

• pulmonary and systemic circulation

• cardiac cycle and its regulation

• cardiac cycle and its regulation

What is the pO₂ and pCO₂ in the systemic arteries?

• pO₂ 40 mm Hg; pCO₂ 45 mm Hg

• pO₂ 95 mmHg; pCO₂ 104 mm Hg

• pO₂ 95 mm Hg; pCO₂ 40 mm Hg

• pO₂ 45 mm Hg; pCO₂ 40 mm Hg

• pO₂ 45 mm Hg; pCO₂ 40 mm Hg