Lesson 6.4.3
6.4.3 One gene giving more than one protein Quiz: Pearson Edexcel Biology, Unit 6
20 questions
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Lesson 6.4.3, One gene giving more than one protein: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 6: Immunity, Infection and Forensics, written with Revision Ninja.
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The 20 questions
-
What regions are joined together during the alternative splicing of pre-mRNA?
- Introns
- Promoters
- Exons
- Codons
-
Which molecule is modified post-transcriptionally to allow one gene to produce multiple proteins?
- Pre-mRNA
- DNA
- Transfer RNA
- Ribosomal RNA
-
How does the total number of human protein-coding genes compare to total proteins produced?
- Fewer genes
- Equal numbers
- More genes
- Double the genes
-
Which non-coding sequences are removed from pre-mRNA during splicing?
- Introns
- Codons
- Exons
- Anticodons
-
What term describes the coding sequences retained in mature mRNA after splicing?
- Operons
- Exons
- Promoters
- Introns
-
How can one gene produce a membrane-bound protein in one cell and a secreted protein in another?
- Gene duplication
- DNA mutation
- Alternative splicing
- Translational inhibition
-
How many exons remain in mature mRNA if exons 1, 2, and 4 are retained from pre-mRNA?
- 2 exons
- 5 exons
- 4 exons
- 3 exons
-
Which process occurs between transcription and translation in eukaryotic cells?
- Protein folding
- RNA splicing
- DNA replication
- Reverse transcription
-
What is the primary biological outcome of alternative splicing in eukaryotic cells?
- Gene mutation
- Chromosomal crossover
- DNA replication
- Protein diversity
-
Which molecule remains completely unaltered during post-transcriptional modification?
- DNA
- Pre-mRNA
- Mature mRNA
- Primary transcript
-
What mechanism allows a single gene to produce two distinct protein isoforms?
- DNA replication
- Alternative splicing
- Frameshift mutation
- RNA interference
-
What is the mapping relationship between protein-coding genes and proteins in human cells?
- One to one
- Many to one
- Two to one
- One to many
-
Which process allows a single gene to code for multiple different proteins?
- DNA replication
- Gene duplication
- Alternative splicing
- RNA cap addition
-
Which molecule carries instructions to the ribosome after pre-mRNA splicing occurs?
- Pre-mRNA
- Mature mRNA
- Ribosomal RNA
- Transfer RNA
-
Which feature of eukaryotic genes allows alternative splicing to produce different proteins?
- Centromeres and telomeres
- Operons and promoters
- Introns and exons
- Plasmids and mesosomes
-
What process produces both membrane-bound and secreted antibodies from one heavy chain gene?
- Somatic hypermutation
- Alternative RNA processing
- DNA methylation
- Reverse transcription
-
What evidence shows that alternative splicing is a regulated process rather than random error?
- Gene silencing
- Constant protein size
- Random exon loss
- Tissue-specific patterns
-
What is NOT directly altered by the process of alternative splicing?
- Amino acid sequence
- Tertiary protein structure
- mRNA sequence
- Chromosomal DNA sequence
-
Why might the same gene produce different length proteins in different tissues?
- Ribosomes alter reading
- Exon inclusion varies
- DNA sequence mutates
- Genetic code changes
-
What is the main function of adding a 5' cap to pre-mRNA?
- Intron removal
- Peptide bond formation
- Ribosome binding support
- Codon triplet alteration
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