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.
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
Which mRNA codon codes for Lysine (lys)?
a) GAU
b) AAA
c) UUU
d) GAC
How many bases are needed for 4 amino acids?
a) 4
b) 1
c) 16
d) 12
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
The mRNA bases form codons and the tRNA holds the complementary _______ .
a) adenine
b) anticodons
c) cytosine
d) amino acids
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
Proteins are composed of smaller subunits called ____________ .
a) adenines
b) amino acids
c) sugars
d) nucleotides
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
molecule that delivers amino acids to the ribosome to synthesize a protein
a) amino acid
b) mRNA
c) DNA
d) tRNA
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
Nine bases in an mRNA sequence equals how many amino acids?
a) 9
b) 1
c) 12
d) 3
Nine bases in an mRNA sequence equals how many codons?
a) 9
b) 1
c) 12
d) 3
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
Which mRNA codon codes for valine?
a) GUU
b) GCU
c) GAU
d) GGU
The sides of the DNA double helix are made of alternating phosphates and ______ .
a) bases
b) sugars
c) adenines
d) proteins
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