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Biology
12th -
University
OpenStax Biology: Chapter 15 Genes and Proteins
16 questions
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- 1. Multiple ChoiceThe AUC and AUA codons in mRNA both specify isoleucine. What feature of the genetic code explains this?complementaritynonsense codonsuniversalitydegeneracy
- 2. Multiple ChoiceHow many nucleotides are in 12 mRNA codons?12243648
- 3. Multiple Choice
In any given species, there are at least how many types of tRNA's?
20
40
100
200
- 4. Multiple Choice
The RNA components of ribosomes are synthesized in the ________.
cytoplasm
nucleus
nucleolus
endoplasmic reticulum
- 5. Multiple Choice
Which pre-mRNA processing step is important for recognition by the small ribosomal subunit?
3' poly-A tail
telomeres
splicing
5' 7-methylguanosine cap
- 6. Multiple Choice
What is the predicted size of the corresponding mature mRNA in base pairs (bp)? (excluding the 5’ cap and 3’ poly-A tail)
220bp
295bp
140bp
435bp
- 7. Multiple Choice
Which sequence of DNA bases would pair with this partial strand
ATG TGA CAG
ATG TGA CAG
TAC ACT GTC
GTA AGT GAC
CAT TCA CTG
- 8. Multiple ChoiceHow does RNA differ from DNA?RNA contains uracil and deoxyriboseRNA contains ribose and thymineRNA contains uracil and riboseRNA contains adenine and ribose
- 9. Multiple ChoiceThe process of making proteins on the ribosome based on instructions from messenger RNA is calledtranscriptiontransformationtranslationmolecular biology
- 10. Multiple ChoiceChanges is DNA sequences that affect genetic information are known asreplicationsmutationstransformationstranslations
- 11. Multiple ChoiceThe process by which the genetic code of DNA is copied into a strand of RNA is calledtranslationtranscriptiontransformationreplication
- 12. Multiple Choice
Which of the following must happen before translation?
Exons are spliced together
Introns are removed
A 3' cap is added to the beginning of the mRNA sequence
A poly-C tail is added to the end of the mRNA sequence
- 13. Multiple Choice
What is the correct order of events for gene expression?
mRNA is transcribed from DNA, mRNA is edited, mRNA attaches to a ribosome, rRNA translates mRNA into a protein
mRNA is transcribed from DNA, mRNA attaches to a ribosome, mRNA is edited, rRNA translates mRNA into a protein
mRNA is translated from DNA, mRNA is edited, mRNA attaches to a ribosome, rRNA transcribed mRNA into a protein
- 14. Multiple Choice
An RNA sequence :AUGCCGAAACGU
Which of the following statements describes how the RNA sequence specifies the production of an amino acid chain?
Each base produces electrical signals sent to the cytoplasm to initiate protein assembly.
Each base codes for one amino acid.
Each group of three bases codes for an enzyme that binds amino acids together.
Each set of three bases codes for a single amino acid.
- 15. Multiple Choice
Many antibiotics interfere with the transfer of genetic information from RNA to protein, preventing bacteria from growing.
Which of the following processes is affected by antibiotics?
Replication
Translation
Transcription
Transmission
- 16. Multiple Choice
A deletion mutation occurs, leaving 11 bases in nucleotide sequence.
What is the maximum number of amino acids that could be coded for by this sequence?
11
9
3
4
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