Chapter 2. 2·20–2·22 Nucleic acids store information on how to build and run a body.

Show What You Know - Self Quiz

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You must read each slide, and complete any questions on the slide, in sequence.

Instructions

Check your understanding of concepts from 2·20–2·22 Nucleic acids store information on how to build and run a body by answering the following questions.

1.

1. What are the essential components of all nucleotides?

Only a phosphate group, a sugar molecule, and an acid.

Only a phosphate group and a sugar molecule.

Only a phosphate group, a nitrogen-containing molecule, and three methyl groups.

Only a phosphate group, a sugar molecule, and a nitrogen-containing molecule.

Only a phosphate group, a sugar molecule, a nitrogen-containing molecule, and three methyl groups.

Correct! (See section 2·20 Nucleic acids are macromolecules that store information.)

Incorrect. (See section 2·20 Nucleic acids are macromolecules that store information.)

2.

2. RNA differs from DNA with regards to the use of the nitrogenous base __ instead of __.

uracil, thymine

adenine, cytosine

cytosine, guanine

uracil, guanine

adenine, uracil

Correct! (See section 2·22 RNA is a universal translator, reading DNA and directing protein production.)

Incorrect. (See section 2·22 RNA is a universal translator, reading DNA and directing protein production.)

3.

3. There are ____ nucleotides in DNA, _____________.

three; glucose, fructose, and lactose

twenty; tryptophan, alanine, glycine, and methionine are examples

four; A, C, T, and G

two; saturated and unsaturated

four; A, C, U, and G

Correct! (See section 2·20 Nucleic acids are macromolecules that store information.)

Incorrect. (See section 2·20 Nucleic acids are macromolecules that store information.)

4.

4. Which type of macromolecule contains an organism's genetic information?

monosaccharide

Phospholipid

fatty acid

DNA

polysaccharide

Correct! (See section 2·21 DNA holds the genetic information to build an organism.)

Incorrect. (See section 2·21 DNA holds the genetic information to build an organism.)

5.

5. All of the following are features of RNA except:

a sugar-phosphate-sugar-phosphate backbone.

a coiled double-stranded structure.

a different type of sugar than is found in DNA.

a different type of base than is found in DNA.

an ability to direct protein production.

Correct! (See section 2·22 RNA is a universal translator, reading DNA and directing protein production.)

Incorrect. (See section 2·22 RNA is a universal translator, reading DNA and directing protein production.)

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