DNA

In RNA, _____ codon(s) translate to ______amino acid(s). a) 1, 1 b) 3, 1 c) 3, 3 d) 1, 20

a) 1, 1

If a DNA molecule is found to be composed of 40% thymine, what percentage of guanine would be expected? a) 10% b) 20% c) 40% d) 80%

a) 10%

Which site of the tRNA molecule binds to the mRNA molecule? a) anticodon b) codon c) amino acid d) 5 prime end

a) anticodon

Okazaki fragments form on the: a) lagging strand b) leading strand c) base-pairs d) 5' end

a) lagging strand

8. Before the Hershey-Chase experiment, many scientists believed that ____ carried the hereditary information. a) proteins b) phages c) helicase d) the plasma membrane

a) proteins

Amino acids are joined together into a protein chain by which of the following? a) transfer RNA b) DNA polymerase c) hydrogen bonds d) messenger RNA

a) transfer RNA

Which of the following is found on RNA but not DNA? a) uracil b) deoxyribose c) phosphate d) adenine

a) uracil

How many different amino acids are used to assemble proteins in cells? a) 3 b) 20 c) 100 d) an infinite number

b) 20

The base pair rules states that: a) Replication is semiconservative b) A pairs with T, G pairs with C c) DNA is a double helix held together by hydrogen bonds d) A pairs with G, T pairs with C

b) A pairs with T, G pairs with C

Given the following DNA strand, which of the following is its complementary mRNA? G G A C T G A T T a) C C T G A C T A A b) C C U G A C U A A c) G G A C T G A T T d) T T A G T C A G G

b) C C U G A C U A A

Which of the following must happen first in order for DNA replication to occur? a) DNA polymerase binds to the leading strand b) DNA is unwound c) Hydrogen bonds form between bases d) Chromosomes condense

b) DNA is unwound

The Hershey-Chase research showed that: a) bacteria could be transformed b) DNA was the molecule of heredity c) DNA was in the shape of a double helix d) bases paired in a predictable way (A's to T's and G's to C's)

b) DNA was the molecule of heredity

In order to transform to a virulent form of bacteria, non encapsulated bacteria must: a) divide b) be exposed to killed capsulated bacteria c) be exposed to radioactive phosphorous d) infect a host

b) be exposed to killed capsulated bacteria

The 5' and 3' numbers are related to the: a) length of the DNA strand b) carbon rings in sugar c) the number of phosphates d) the base pair rule

b) carbon rings in sugar

Transcription results in: a) an amino acid chain b) messenger RNA c) complementary DNA d) okazaki fragments

b) messenger RNA

The sugar in RNA is _____, the sugar in DNA is _______. a) deoxyribose, ribose b) ribose, deoxyribose c) ribose, phosphate d) ribose, uracil

b) ribose, deoxyribose

How many different codons are possible? a) 3 b) 20 c) 64 d) an infinite number

c) 64

The element that transformed the bacteria in Griffith's experiments was: a) protein b) capsules c) DNA d) heat

c) DNA

A DNA strand has the following bases: A A G C C A. What are the bases on its complimentary strand? a) A A G C C A b) A C C G A A c) T T C G G T d) C C A T T C

c) T T C G G T

A nucleotide consists of: a) a nitrogen base b) a nitrogen base and a sugar c) a nitrogen base, sugar, and phosphate d) two nitrogen bases, a sugar, and a phosphate

c) a nitrogen base, sugar, and phosphate

Translation begins: a) at the replication fork b) on the lagging strand c) at the start codon d) in the nucleus

c) at the start codon

A stretch of chromosome that codes for a trait can be called a(n): a) chromatid b) replication fork c) gene d) base-pair

c) gene

Okazaki fragments occur on the ___ and are bonded together by ______. a) leading strand, polymerase b) mRNA, anticodons c) lagging strand, ligase d) tRNA, polymerase

c) lagging strand, ligase

Which of the following is NOT a necessary component of translation? a) anticodon b) mRNA c) ligase d) amino acid

c) ligase

RNA is synthesized on a DNA template in a process called ______, which utilizes the enzyme _______ a) translation, RNA polymerase b) transcription, DNA polymerase c) transcription, RNA polymerase d) replication, DNA polymerase

c) transcription, RNA polymerase

Proteins contain ____ different amino acids, whereas DNA and RNA are composed of ___ different nucleotides. a) 20, 64 b) 3, 20 c) 4, 20 d) 20, 4

d) 20, 4

Once transcription has been completed, which of the following is NOT necessary for protein synthesis to occur? a) tRNA b) ribosomes c) mRNA d) DNA

d) DNA

A nucleotide consists of: a) a phosphate and a base b) a phosphate, and a sugar c) a base and an amino acid d) a phosphate, a sugar, and a base

d) a phosphate, a sugar, and a base

Which of the following is required for DNA replication to occur? a) DNA helicase b) DNA ligase c) DNA polymerase d) all of these

d) all of these

The "rungs" of the DNA ladder are made of: a) phosphates and bases b) sugars c) sugars and phosphates d) bases

d) bases

During replication, what enzyme adds complimentary bases? a) helicase b) synthesase c) replicase d) polymerase

d) polymerase