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WorksheetsBiology Unit 6 DNA
Total questions: 30
Worksheet time: 3600secs
How many nucleotides are needed to create a codon?
1
2
3
4
Which one of the following is not part of a nucleotide for DNA?
Deoxyribose sugar
Phosphate
Nitrogenous base - uracil
Nitrogenous base - cytosine
Which of the following is not part of an RNA nucleotide?
Ribose sugar
Phosphate
Nitrogenous base - adenine
Nitrogenous base - thymine
What holds the base-pairs together?
chemical bonds
hydrogen bonds
phosphodiester bonds
ionic bonds
What is a sequence of nucleotides that directs the synthesis of a product (ex: protein)
gene
transfer RNA
codon
DNA polymerase
Where does DNA replication occur?
nucleus
ribosome in cytoplasm
mitochondria
ribosome in chloroplast
A sample of DNA is 20% cytosine. What percentage would be guanine?
80%
20%
40%
30%
What organelle makes it possible for mRNA to be translated into proteins?
nucleus
DNA
Golgi body
ribosome
Anticodon is found on
DNA
mRNA
tRNA
ribosome
Codon is found on
DNA
mRNA
tRNA
ribosome
Amino acids are identified by
DNA
mRNA
tRNA
ribosomes
Which one should be like the DNA, with T and U being switched?
DNA
mRNA
tRNA
genes
Which substances carries information from the nucleus to the cytoplasm?
DNA
mRNA
tRNA
rRNA
A DNA segment is AAG, what is the other DNA strand?
AAG
TTC
UUC
AAT
A DNA segment is TGA. What is the corresponding mRNA strand?
TGA
ACT
ACU
ACA
A DNA segment is GCT. What is the tRNA segment?
GCT
CGA
GCU
CGT
Which scientist did NOT contribute to the discovery of the double helix nature of DNA?
Mendel
Franklin
Watson
Crick
Which substance is a copy of the DNA that will transfer from the nucleus to the cytoplasm (ribosome)?
tRNA - translation
mRNA - transcription
tRNA - replication
mRNA - translation
Which substance picks up and brings amino acids to the ribosomes in the cytoplasm?
mRNA - translation
tRNA - transcription
mRNA - replication
tRNA - translation
What is the product of transcription?
tRNA
mRNA
chain of amino acids
sugar
Which is the second step?
a strand of mRNA is copied from DNA (transcription)
mRNA moves from nucleus to cytoplasm and attaches to ribosome
tRNA picks up amino acid and bonds to specific codon on mRNA (translation)
amino acid chain is created
A change in a base sequence of an organism's DNA is a
genotype
mutation
lysosome
helicase
A mutation in which a base is missing is called
insertion
deletion
substitution
recombination
A segment of DNA is changed from ATAA to ATTA, this is an example of
insertion
recombination
substitution
deletion
All of the following might serve as mutagenic agents, except
ultraviolet rays
pollinating agents
gamma rays
X-rays
Which shows the correct base pairing for DNA?
A - G
G - C
A - G
U - A
Which shows the correct base pairing for RNA?
A - T
G - A
U - A
C - T
Proteins are a sequence of
nucleotides
amino acids
monosaccharides
ribosomes
Genetic information is changed from ATT GCA to ATT GCA T
substitution
deletion
insertion
synthesis
What molecules do both RNA and DNA contain?
nucleotides
thymine
uracil
deoxyribose
