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WorksheetsGenetics Shorty
Total questions: 15
Worksheet time: 45mins
How many codons are located on the messenger RNA molecule in the diagram?
1
6
3
9
What does Structure B represent a molecule of?
nuclear DNA
cytoplasmic DNA
ribosomal RNA (rRNA)
transfer RNA (tRNA)
In the synthesis of proteins, what is the function of messenger-RNA molecules?
They act as a template for the synthesis of DNA.
They carry information that determines the sequence of amino acids.
They remove amino acids from the nucleus.
They carry specific enzymes for dehydration synthesis.
A sequence of three nitrogenous bases in a messenger-RNA molecule is known as a
codon
gene
polypeptide
nucleotide
"Nitrogenous bases" - sounds fancy. You say it like this: nie-TROJ-e-nus" You've been reading it a lot - but have you broken in down? Let's see!
Nitrogenous bases means ______?
That the bases HAVE the element called nitrogen in them.
That the bases DO NOT HAVE the element called nitrogen in them.
Which base is normally used in the synthesis of RNA but not in the synthesis of DNA?
adenine (A)
uracil (U)
cytosine (C)
guanine (G)
If a portion of a messenger RNA molecule contains the base sequence A-A-U, the corresponding transfer RNA base sequence is
A-A-U
G-G-T
T-T-C
U-U-A
What is the complementary messenger-RNA sequence for the DNA sequence shown here?
C-A-A-G-G-U
G-T-T-C-C-A
G-U-U-C-C-A
C-A-A-G-G-T
When provided with a sequence of bases in one segment of mRNA, the Universal Genetic Code Chart is used to
directly identify the DNA from an animal cell
determine the sequence of amino acids in a protein
change the RNA sequence of a protein into DNA
identify the specific mutations in the genetic material in a cell
In a cell, protein synthesis is the primary function of
ribosomes
mitochondria
chloroplasts
vacuoles
These photographs show some physical similarities between John Lennon and his son Julian. Which conclusion can be drawn regarding these similarities?
The DNA present in their body cells is identical.
The percentage of their proteins with the same molecular composition is high.
The base sequences of their genes are identical.
The mutation rate is the same in their body cells.
What is the bond labeled 5 known as?
a peptide bond
a hydrogen bond
an ionic bond
a carboxyl bond
(A) Messenger RNA attaches to a ribosome.
(B) DNA serves as a template for RNA production.
(C) Transfer RNA bonds to a specific codon.
(D) Amino acids are bonded together.
(E) RNA moves from the nucleus to the cytoplasm.
The correct order of these events is
B - E - A - C D
D - A - E - C - B
B - C -E - D - A
C - B - A - E - D
In a cell, the transfer of genetic information from DNA to RNA occurs in the
cell membrane
endoplasmic reticulum
nucleus
nucleolus
The subunits of proteins are
nucleotides
amino acids
ribosomes
sugars
