Online Homework 6-Carbohydrates-BIOL-107

Is the molecule C20H40O2 a carbohydrate or a lipid?

lipid
carbohydrate

Question 2

How many carbons do hexose sugars contain?

4
6

5

7

3

Question 3

They are held together with ionic bonds

They don’t. Carbohydrates are hydrophobic.

Question 4

This is the sugar component of deoxyribonucleic acid, the hereditary molecule.

This is the monosaccharide that is combined with glucose to become lactose, milk sugar.

This is a monosaccharide made by plants; when combined with glucose, sucrose results.

This is the polysaccharide found in the cell walls of plants. It cannot be digested by mammals, but bacteria living in the rumens of cows, sheep, goats, etc, break it down for them.

This disaccharide is formed when starches are digested by enzymes

The monosaccharide found in the blood and most useful to cells for immediate energy. The brain needs this to function.

The monosaccharide found in ribonucleic acid, RNA.

The disaccharide found in milk; some people lack the enzyme to digest this.

The polysaccharide that stores energy in plants; it is commonly found in pasta and bread (from wheat seeds), and potatoes.

Question 5

Which of these are monosaccharides? (choose all that apply)

glycogen

chitin

deoxyribose

galactose

cellulose

glucose

Are ribose and deoxyribose isomers?

yes
no

Question 7

Which of these are disaccharides? (choose all that apply)

starch

chitin

maltose

lactose

cellulose

Which of these are polysaccharides? (choose all that apply)

fructose

galactose

deoxyribose

cellulose

chitin

Question 9

liver and muscles

brain and blood

fat tissue

small and large intestine

kidneys and hair

Question 10

Which of the following have chitin shells?

clams

turkeys

earthworms

grasshoppers

lobsters

shrimp

scallops

Cows, sheep, goats, deer, etc., are cud chewers; they can derive nutritional value from high cellulose foods while we cannot. Why?

Those animals contain special enzymes that perform the necessary dehydration synthesis reactions in their digestive tracts to turn the cellulose into the necessary protein so they can provide meat.

Those animals (ruminants) have bacteria living within their digestive system that use hydrolysis reactions to digests cellulose to glucose for them.

Question 12

Starch is broken into individual glucose molecules using a reaction called ____________________.

dehydration synthesis
hydrolysis

Answer Preview-Online Homework 6-Carbohydrates-BIOL-107

Online Homework 6-Carbohydrates-BIOL-107