HW Assngmnt. #6

Which complex carbohydrate contains only a-1,4-glycosidic linkages?

Amylose

On food packages, to what does the term insoluble fiber refer?

Cellulose

Which of these is a polysaccharide?

Cellulose

_____ is the most abundant organic compound on Earth.

Cellulose

Which of the following complex carbohydrates is listed with its correct function?

Cellulose: structural component of plant cell walls

Which molecule is not a carbohydrate?

Lipid

Which of these is a source of lactose?

Milk

____________________ cannot be hydrolyzed any further.

Monosaccharide

A food company hydrogenated a barrel of fat. The treatment _______________.

(a) made the fat LESS fluid

The presence of many C-C and C-H bonds causes fats to be _________________.

(a) rich in energy & (b) insoluble in water

Triglycerides vary with respect to the number of ______________.

(b) C atoms in the tail & (c) double bonds in the tails

What do fats, steroids, and waxes have in common?

(b) LOW solubility in water

Which of the following is the smallest carbohydrate?

Lactose

Which of the following statements about monosaccharide structure is true?

Monosaccharides can be classified according to the spatial arrangement of their atoms.

Which of these is rich in unsaturated fats?

Olive oil

Which polysaccharide contains a modified monosaccharide?

Peptidoglycan

Which of these is NOT a lipid?

RNA

What is the structure shown in the figure?

Steroid molecule

Dr. Haxton told one of his students, "To move in the bloodstream, fats need the help of phospholipids." What would a good student say?

Yes. Nonpolar molecules aren't compatible with water.

Glycogen is ____________.

a polysaccharide found in animals

A function of cholesterol that does not harm health is its role ___________.

as a component of animal cell membranes

Lactose, the sugar in milk, is a _________________, because it can be split into TWO monosaccharides.

disaccharide

In the reaction that builds a fat,________ groups react with ________ groups.

hydroxyl ; carboxyl

A carbohydrate that yields many monosaccharides when hydrolyzed is a ______________________.

polysaccharide

What do DNA, proteins, and fats have in common?

They contain carbonyl groups.

True or false? Peptidoglycan is a polysaccharide found only in bacteria.

True

A simple sugar is composed of equal parts carbon and water, which gave rise to the general name of any sugar as ____________.

carbohydrate

In fat synthesis,________and fatty acids combine to make fats plus________.

glycerol ; water

The highlighted part of this molecule is derived from _______________.

glycerol backbone

glucose + glucose —> _____ by _____.

maltose + water ... dehydration synthesis

A molecule with the chemical formula C6H12O6 is probably a _____________.

monosaccharide

The characteristic that all lipids have in common is that __________.

none of them dissolve in water

This figure is an example of a(n) _____.

saturated fat

The most unsaturated fats have ________________.

the MOST double bonds

Carbohydrates, more commonly known as sugars, are made up of carbon, oxygen, and hydrogen atoms. The smallest unit of a carbohydrate is a monosaccharide. Two monosaccharides make up a disaccharide, and many monosaccharides make up a polysaccharide. Disaccharides and polysaccharides can be hydrolyzed back into the individual monosaccharide units. What is incorrect?

All carbohydrates have the general formula Cn(H2O)n.

Lactose, a sugar in milk, is composed of one glucose molecule joined by a glycosidic linkage to one galactose molecule. How is lactose classified?

As a disaccharide