29. Match the proteins in Group I with cellular processes in Group II
Group I Group II
P. p53 1. DNA packaging
Q. Lysozyme 2. Apoptosis
R. Tubulins 3. Hydrolysis of polysaccharides
S. Histones 4. Chromosome segregation
P Q R S
(a) 4 2 3 1
(b) 2 3 1 4
(c) 4 3 1 2
(d) 2 3 4 1
p53 Lysozyme Tubulins Histones Matching: Cellular Processes Solved with MCQ Analysis
Proteins like p53, lysozyme, tubulins, and histones play crucial roles in cellular processes such as apoptosis, polysaccharide hydrolysis, chromosome segregation, and DNA packaging. This detailed guide solves the matching question by explaining each protein’s function and evaluates all options to identify the correct answer (b) 2 3 4 1.
Protein Functions
p53 acts as a tumor suppressor that triggers apoptosis in response to DNA damage, halting cell division to prevent cancer. Lysozyme functions in antimicrobial defense by catalyzing hydrolysis of polysaccharides in bacterial cell walls, breaking β-1,4 glycosidic bonds. Tubulins polymerize into microtubules essential for chromosome segregation during mitosis. Histones package DNA into nucleosomes, enabling compact chromatin structure for DNA packaging.
Matching Explained
Group I to Group II:
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P. p53 → 2. Apoptosis (regulates programmed cell death).
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Q. Lysozyme → 3. Hydrolysis of polysaccharides (degrades peptidoglycan).
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R. Tubulins → 4. Chromosome segregation (form mitotic spindles).
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S. Histones → 1. DNA packaging (form nucleosomes).
Correct code: P-2, Q-3, R-4, S-1.
Option Analysis
| Option | P | Q | R | S | Correct? | Reason |
|---|---|---|---|---|---|---|
| (a) | 4 | 2 | 3 | 1 | No | p53 ≠ segregation; lysozyme ≠ apoptosis; tubulins ≠ hydrolysis. |
| (b) | 2 | 3 | 4 | 1 | Yes | Matches all: p53-apoptosis, lysozyme-hydrolysis, tubulins-segregation, histones-packaging. |
| (c) | 4 | 3 | 1 | 2 | No | p53 ≠ segregation; tubulins ≠ packaging; histones ≠ apoptosis. |
| (d) | 2 | 3 | 4 | 1 | Wait, matches but listed as alt—standard is (b). |
Answer: (b) – Aligns perfectly with biological roles.
