Chapter 25 Quiz

If an organism has 30% G, what percent T does it have?

20%

In which direction is the new DNA strand built during replication?

5' to 3'

Chargaff's rules of DNA structure states that

A=T, G=C

For translation to take place, which of the following would NOT be required to be present?

DNA

During the process of transcription, the information in

DNA is converted into RNA information

What enzyme is responsible for transcription?

RNA polymerase

Which of the following is NOT true of ribosomes?

They bind only one type of amino acid

The people who "discovered" the structure of the DNA molecule are:

Watson and Crick

What do we call a stretch of DNA that determines a trait in an organism?

a gene

What is attached to a tRNA that's in the A site of a ribosome?

an amino acid

The function of transfer RNA is to

carry amino acids to ribosomes

A gene is physically located on a ________ in the nucleus of a cell

chromosome

What sugar is used in making DNA nucleotides?

deoxyribose

For the following template strand of DNA, what would be the polypeptide coded for? 3'TACAGCGCGTCTGACATC 5'

met - ser - arg - arg - leu

In semiconservative DNA replication, each new double helix formed will have

one new and one old strand in each helix

If the protein coat of a virus that infects a bacterium is labeled with radioactive sulfur and the DNA of the virus is labeled with radioactive phosphorus, over time

only the phosphorus will be found inside the bacterium

Which class of RNA molecules is linked with proteins in forming the large and small subunits of a cytoplasmic structure?

ribosomal RNA

Prior to protein synthesis, the DNA

serves as a template for the production of mRNA.

In the Watson-Crick model of DNA, the "sides" of the ladder are composed of

sugar-phosphate molecules

What does the codon ACU code for?

thr (threonine)

The amount of adenine is always equal to the amount of ________ in DNA.

thymine

The addition of a poly-A tail to mRNA occurs after which of the following?

transcription

Which is the process that synthesizes mRNA?

transcription

Initiation, elongation, and termination are three stages in

translation

Which of the following nucleotide bases is found only in RNA, not in DNA?

uracil