WorksheetsUnit 5 Review
Total questions: 25
Worksheet time: 15mins
What determines the traits of an organism?
Relation of AT to CG base pairs
Number of nitrogen bases in RNA
Presence of ribose or deoxyribose in a nucleic acid
Sequence of nitrogen bases in DNA
Which biomolecule is used to transmit genetic information?
Lipids
Carbs
Proteins
Nucleic acids
Of the following bases, which one is not found in DNA?
Adenine
Uracil
Guanine
Thymine
What is one function of nucleic acids?
Nucleic acids are used to break hydrogen bonds during transcription.
Nucleic acids catalyze the reactions that occur during protein synthesis.
Nucleic acids give the instructions for traits and characteristics.
Nucleic acids provide the energy required for replication.
A linear code of 3 sequential bases on one side of a DNA molecule is a —
base pair
codon
amino acid
gene
What is one of the functions of nucleic acids?
Stores genetic information and helps to make proteins
Increases the rate of chemical reactions
Stimulates metabolism in all body cells
Activates secretion of the body's hormones
Which of the following statements best describes how the traits of an organism are determined by the DNA in their cells?
DNA provides the energy needed for an organism to grow and function.
DNA is copied into mRNA, which controls cellular functions.
DNA codes for proteins which allow an organism to grow and function.
DNA unzips and each strand codes for a different amino acid.
What is the function of the nucleic acid tRNA?
Carries genetic information from the DNA to ribosomes
Carries amino acids to protein-building ribosomes
Facilitates chemical reactions that form ribosomes
Serves as the site of protein synthesis
What is the function of mRNA?
Carrying the genetic message from DNA in the nucleus to the ribosomes
Providing the energy for the duplication of cells
Preventing mutations in the genetic code
Storing food material for keeping cells alive
When the process of mitosis is correctly completed, the daughter cells should contain exact copies of all of an organism's genes. Which biomolecule contains all of an organism's genes?
Carbs
Lipids
Proteins
Nucleic acids
Which type of molecule is attached to an amino acid in the model?
mRNA
rRNA
tRNA
Protein
Which mutation(s) will leave the amino acid unchanged?
Mutation 1 only
Mutation 4 only
Mutations 1 and 3
Mutations 2, 3, and 4
What is the structure that is labeled by an X?
Amino acid
Codon
Anticodon
Polypeptide
The synthesis of which molecule(s) could be affected by the mutation of DNA?
mRNA only
Proteins only
Both mRNA and proteins
Neither mRNA nor proteins
What molecule has a complementary codon that would temporarily bond with the section labeled X?
mRNA
rRNA
tRNA
DNA
Which point mutation is correctly matched to the description?
X is a substitution.
Y is an insertion.
Z is a deletion.
Y is a translocation.
What is the polypeptide chain that is coded for by the following mRNA sequence?
5'-AUGGCAAGAAAA-3'
Methionine, Asparagine, Arginine, Lysine
Methionine, Alanine, Arginine, Lysine
Asparagine, Serine, Arginine, Lysine
Valine, Tyrosine, Stop, Lysine
A mutation that inserts or deletes one or two nucleotides is usually more harmful than a mutation that substitutes one base for another because —
it changes one amino acid in the sequence of a protein
it shifts the reading frame for the rest of the code causing many errors
the codon consists of three nucleotides coding for an amino acid
the chromosomes fail to separate resulting in trisomy 21
What is the RNA codon that is complimentary to the following DNA sequence?
3’-GCA-5’
CGT
GCA
CGU
ACG
Cell mutations within a DNA sequence are —
unnatural events that are harmful to genetic diversity
unnatural events that always affect the phenotype
natural events that produce genetic diversity in organisms
natural events that always affect the phenotype
What is the correct order of the steps shown above?
I, II, III, IV
II, III, I, IV
IV, II, I, III
IV, III, II, I
Any change in the sequence of DNA nucleotides is called a —
transgenic shift
monohybrid trait
single genotype
mutation
What structure is used by ribosomes as the instructions for making proteins?
DNA
mRNA
rRNA
tRNA
What are the locations and end products for the processes of transcription and translation?
Transcription occurs in the nucleus and creates an mRNA strand; translation occurs at a ribosome and makes a polypeptide.
Transcription occurs at a ribosome and makes a polypeptide; translation occurs in the nucleus and creates an mRNA strand.
Transcription occurs in the nucleus and creates a polypeptide; translation occurs at a ribosome and makes an mRNA strand.
Transcription occurs at a ribosome and makes an mRNA strand; translation occurs in the nucleus and creates a polypeptide.
What is the purpose of the process in the diagram?
Ensure that each cell has an exact copy of the genome
Repair mutations to ensure the cell is not harmed
Transcribe a gene for use in making proteins
Bond amino acids to form polypeptide chains
