Answer: Multiple different proteins from the same pre-mRNA by including/excluding different exons.
- A Exactly one single, fixed protein product with little variation across different tissues
- B Multiple different proteins from the same pre-mRNA by including/excluding different exons
- C Mainly two fixed protein variants regardless of the tissue type being examined
- D Mainly progressively shorter, truncated protein products lacking key functional domains
Correct answer: B. Multiple different proteins from the same pre-mRNA by including/excluding different exons
Explanation: Alternative splicing: different combinations of exons are joined to create multiple mRNA isoforms from one gene. Greatly expands protein diversity (~95% of human genes undergo it).
Punnett square for a monohybrid cross between two heterozygous (Tt) parents, showing the 3:1 phenotypic ratio predicted by Mendel's Law of Segregation.
Concept context
Mendel's laws, inheritance patterns, DNA structure, and molecular biology. Core of NEET biology.
Read the full Principles of Inheritance and Variation notes →