WorksheetsGenetics Practice Test
Total questions: 20
Worksheet time: 11mins
Which of the four molecules is found in DNA?
ribose
deoxyribose
uracil
glucose
The main difference between the four nucleotides that make up DNA is that they have different __________.
sugars
uracil
phosphates
nitrogen bases
In human cells, where does DNA replication take place?
Cytoplasm
Nucleus
Ribosome
Vacuole
The cellular process of creating two new DNA molecules from one original copy is called replication. Which statement is the BEST description of this process?
DNA opens up and RNA copies it.
DNA opens up and is used for two DNA molecules different from the original.
DNA opens up and each strand is used to make an identical strand of DNA.
RNA opens up and is used to make a new strand of DNA.
Amino acids in a polypeptide are held together by peptide bonds, a specific type of covalent bond.
true
false
The sequence of __________ in a DNA molecule determines the protein that will be produced.
lipids
nucleotides
proteins
sugars
What is the role of transfer RNA (tRNA) in protein synthesis?
Carrying the messenger RNA to the ribosome
Bringing amino acids to the ribosome
Reading off the genes in the DNA
Coding for three amino acids in a protein
What is the result of translation?
DNA
Protein
mRNA
Lipids
What is the primary function of tRNA during translation?
Synthesizing DNA
Carrying amino acids to the ribosome
Decoding mRNA
Forming peptide bonds
What is the structure of DNA?
Single Strand
Triple Helix
Double Helix
Quadruple Strand
Which enzyme is responsible for adding nucleotides to a growing DNA strand?
Helicase
Ligase
DNA Polymerase
Primase
What is the primary function of DNA in cells?
Energy storage
Protein synthesis
Genetic information storage
Cell membrane structure
Which of the following is not a component of a nucleotide?
Phosphate group
Nitrogenous base
Amino acid
Sugar
tRNAs act like taxis to pick up and drop off the ________________ that match with each codon.
Amino acids
Nucleotides
Sugars
Lipids
When the “________________” is reached, the ribosome releases the completed polypeptide chain.
Stop codon
Start codon
Amino acid
Ribosome binding site
Which type(s) of RNA are involved in transcription and translation?
mRNA, tRNA, rRNA
mRNA, tRNA
rRNA, tRNA
mRNA, rRNA
Where does translation occur in the cell?
Ribosome, Cytoplasm
Mitochondria, Cytoplasm
Golgi apparatus, Nucleus
Endoplasmic reticulum, Cytoplasm
A segment of DNA is shown in the diagram. Which of these identifies the part of the DNA segment labeled X?
Nucleotide
Phosphate group
Hydrogen bond
Deoxyribose
A Nucleotide is shown above. What part of the Nucleotide is labelled "3"?
Sugar
Phosphate
Nitrogenous Base
