Chapter 3 Questions

n a dehydration reaction, ________. In order for this to occur water is ________.

monomers are joined to become a polymer; removed

Plants store their sugar in the form of

starch

Which of the following elements would be found in a carbohydrate?

C, H, O

Which formula is a hydrocarbon?

CH4

Which of the following is not an organic molecule?

COCl2

A gene in DNA is the code for assembling a sequence of

amino acids

The following figure represents which process?

dehydration synthesis

Which nitrogen-containing base is found in RNA but not in DNA?

uracil

In addition to carbon, an organic molecule must contain

hydrogen

Glycogen is a ________ made of many ________.

polymer; glucose molecules

Testosterone is a lipid-based hormone; insulin is a ________-based hormone.

protein

Refer to the figure. Which of the following is true regarding the labeled plasma membrane?

Parts W and Z are hydrophilic

Of the following, which is a feature that proteins and polysaccharides share?

They are made of repeated monomer units

Which of the following is in correct order from smallest to largest?

amino acid - peptide - polypeptide

Which of the following would describe a polypeptide?

amino acids joined by dehydration synthesis reactions

Which one of the following is not a potential danger of anabolic steroids?

can enhance the body's production of normal sex hormones

The four main categories of organic macromolecules are

carbohydrates, lipids, proteins, and nucleic acids

A molecule is said to be organic if it contains

carbon and hydrogen atoms

Wood and cotton cloth are composed of

celluose

Select the incorrect association.

fructose - a polysaccharide

Which word does not belong with the others?

glycogen

Which of the following is not a dehydration synthesis reaction?

glycogen forming glucose molecules

What category of biological molecules are steroids included in?

lipids

Select the incorrect association.

proteins—have three forms: monosaccharides, disaccharides, and polysaccharides

The term "functional" is used in the phrase "functional group" because it describes a group of atoms that

react a certain way with other molecules