AP (Advanced Placement) Biology: Questions 513 - 515 of 902

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Question 513

Question

MCQ▾

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 514

Question

MCQ▾

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.

Question 515

Question

MCQ▾

Melting of DNA at an elevated temperature of 700 C is primarily due to the breakdown of

Choices

Choice (5)Response

a.

Phosphodiester bonds

b.

Disulphide bonds

c.

Glycosidic bonds

d.

Phosphoester bonds

e.

Hydrogen bonds

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