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WorksheetsProtein Synthesis, Inheritance, Biotechnology
Total questions: 20
Worksheet time: 10mins
How many mRNA bases are needed to specify an amino acid?
3
6
5
2
If a tRNA molecule that is specialized for the transfer of the amino acid valine has the anticodon CAG, it will couple with the codon
GUC
CTT
TUG
GAC
The function of the promoter is to signal the RNA polymerase
where to add the first amino acid to the protein.
where to start translating the DNA.
where to start transcribing the DNA.
which strand of the DNA to read.
Which point mutation would be most likely to have a catastrophic effect?
A base substitution
A base deletion near the start of the coding sequence
A base deletion near the end of the coding sequence
The deletion of three bases near the start of the coding sequence
How can a single gene code for more than one protein?
The exons within an mRNA can be spliced together in different ways.
Different amino acid chains can be coded by the same mRNA.
Different types of ribosomes translate the resulting mRNA, producing different proteins.
Different RNA polymerases transcribe it and produce different proteins.
A tRNA molecule brings ________ to the ribosome during protein synthesis.
a polypeptide
RNA polymerase
mRNA
an amino acid
What is the ratio of phenotypes in the offspring produced by the cross Aa × Aa? Assume complete dominance for the trait.
75% dominant: 25% recessive
50% dominant: 50% recessive
100% recessive
80% recessive
According to the law of segregation
pairs of alleles on homologous chromosomes separate during the formation of gametes.
the sex chromosomes of males and females differ.
pairs of alleles fuse during the formation of gametes.
each individual carries a single copy of each "factor."
Which of the following is TRUE of genes that are physically located close to each other on the same chromosome?
They will be expressed differently in males than in females.
They are linked and tend to be inherited together.
They are not linked.
They tend to not be inherited together.
A recessive allele is one
that is not expressed as strongly as a dominant allele.
that produces no effect when present in the homozygous condition.
whose effect is masked when paired with a dominant allele.
that appears only in a heterozygote.
In humans, the sex of the offspring is determined by the
autosomes carried by the egg cell.
sex chromosome carried by the sperm cell.
sex chromosome carried by the egg cell.
autosomes carried by the sperm cell.
Crossing smooth-seeded pea plants with wrinkled-seeded pea plants resulted in progeny that all had smooth seeds. This indicates that the wrinkled-seed trait is
codominant and dominant.
recessive only.
dominant only.
codominant only.
When the expression of a trait is influenced by the action of many genes, the pattern of inheritance is called
complete dominance.
multiple alleles.
discontinuous variation.
polygenic inheritance.
1. Which of the following conditions may cause infertility in a human and is known as Klinefelter syndrome?
xxx
xxy
xy
xyy
Which of the following results from inserting foreign DNA into an organism to produce a new gene combination?
Mutations
Recombinant DNA
Regulatory genes
Translation
Small, accessory chromosomes found in bacteria that are useful in recombinant DNA procedures are called
centrioles.
bacteriophages.
plasmids.
viroids.
PCR is essential for
making many copies of a small amount of DNA.
analyzing a person's fingerprints.
allowing restriction enzymes to cut DNA.
creating recombinant plasmids.
Restriction enzymes
randomly cut DNA into small pieces.
can cut only bacterial DNA.
separate the strands of DNA during PCR.
produce single-stranded DNA fragments with "sticky ends."
Which of the following involves the use of human genes?
Herbicide-resistant corn
Insulin production by bacteria
Genetically altered soybean oils
Banana-based vaccine against pathogenic E. coli
Which statement correctly describes transcription?
RNA chains of different genes can be transcribed from either DNA strand, with RNA polymerase traveling from the 3' end and moving toward the 5' end.
RNA chains of all genes are synthesized from the same DNA strand, with the growing RNA strand always starting at the 5' end and moving toward the 3' end.
RNA chains of all genes are synthesized from the same DNA strand, with the growing RNA strand always starting at the 3' end and moving toward the 5' end.
RNA chains of different genes can be transcribed from either DNA strand, with RNA polymerase traveling from the 5' end and moving toward the 3' end.
