Genes And DNA Question Preview (ID: 35325)


Quiz Review For Chapter 4. You Will Need A Codon Chart For Some Questions. TEACHERS: click here for quick copy question ID numbers.

The sides of the DNA double helix are made of alternating phosphates and ______ .
a) bases
b) sugars
c) adenines
d) proteins

If there is 35% guanine in a sample of DNA, how much thymine is in the sample?
a) 10%
b) 15%
c) 20%
d) 35%

CUG codes for which amino acid?
a) proline
b) leucine
c) glycine
d) arginine

Nine bases in an mRNA sequence equals how many codons?
a) 9
b) 1
c) 12
d) 3

Nine bases in an mRNA sequence equals how many amino acids?
a) 9
b) 1
c) 12
d) 3

To replicate, a DNA molecule
a) splits apart at the hydrogen bonds
b) loses its phosphates
c) dissolves its sugar molecules
d) must make tRNA

A(n) _________ is a segment of DNA that holds instructions for a trait.
a) protein
b) amino acid
c) gene
d) base

molecule that delivers amino acids to the ribosome to synthesize a protein
a) amino acid
b) mRNA
c) DNA
d) tRNA

If a sample of DNA has 20% cytosine, how much adenine is in the sample?
a) 20%
b) 30%
c) 25%
d) 35%

One of the 4 bases in RNA - pairs with adenine.
a) thymine
b) cytosine
c) uracil
d) guanine

Proteins are composed of smaller subunits called ____________ .
a) adenines
b) amino acids
c) sugars
d) nucleotides

A nucleotide consists of a sugar, a base, and a __________ .
a) deoxyribose
b) ribose
c) phosphate
d) guanine

__________ carries the DNA code from the nucleus to the ribosome.
a) mRNA
b) tRNA
c) Nucleotide
d) DNA

Which mRNA codon codes for valine?
a) GUU
b) GCU
c) GAU
d) GGU

The mRNA bases form codons and the tRNA holds the complementary _______ .
a) adenine
b) anticodons
c) cytosine
d) amino acids

The four nitrogenous bases in RNA are:
a) A T C G
b) A U C G
c) A B C D
d) U U A G

How many bases are needed for 4 amino acids?
a) 4
b) 1
c) 16
d) 12

Which mRNA codon codes for Lysine (lys)?
a) GAU
b) AAA
c) UUU
d) GAC

How many codons equal 3 amino acids?
a) 1
b) 2
c) 3
d) 4

What is the sugar in DNA called?
a) ribose
b) glucose
c) deoxyribose
d) deoxyfructose

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