AP (Advanced Placement) Biology: Questions 512 - 514 of 868

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Question number: 512

» Circulatory, Immune & Lymphatic Systems

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MCQ▾

Question

Which of the following is the correct sequence of events that occurs during blood clotting?

Choices

Choice (5)Response

a.

Fibrin produces thrombin thrombin produces prothrombin prothrombin produces prothrombin activator prothrombin activator plus calcium produces clot

b.

Prothrombin activator produces Thromboplastin calcium binds prothrombin activator thrombin produces fibrin fibrin produces clot

c.

Thrombin produces fibrinogen fibrinogen produces prothrombin activator prothrombin activator produces clot

d.

Calcium binds prothrombin activator prothrombin activator produces thrombin thrombin produces fibrin fibrin produces clot

e.

Thrombin produces fibrinogen fibrinogen produces prothrombin prothrombin produces prothrombin activator prothrombin activator plus calcium produces clot

Question number: 513

» Eukaryotic Cell

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MCQ▾

Question

Which of the following is Not suitable for studying the cellular cytoskeleton?

Choices

Choice (5)Response

a.

Transmission electron microscopy

b.

Laser confocal microscopy

c.

Electron cryotomography

d.

X-ray crystallography

e.

Spinning confocal microscopy

Question number: 514

» Digestive & Excretory Systems

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MCQ▾

Question

Following statement is true about the absorption of carbohydrates is

Choices

Choice (5)Response

a.

Complex carbohydrates are brought into epithelial cells by active transport and then enter the lacteals by facilitated diffusion.

b.

Polysaccharides are broken down into simple sugars in the intestinal lumen and then passively diffuse into the lymph vessels lacteals.

c.

Lipids are broken down into monosaccharides in the intestinal lumen and are then brought into the epithelial cells by facilitated transport.

d.

Since the sugar concentration is highest in the intestinal lumen and lowest in the blood, simple diffusion is there in all that is needed to get the sugar into the blood.

e.

Simple sugars enter epithelial cells by active transport, exit these cells by facilitated diffusion, and then enter capillaries by simple diffusion.

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