NEET 2026 ALL Q #2012
COMPETENCY BASED
APPLY
4 Marks 2026 NTA-RE-NEET-2026 MCQ SINGLE
Which of the following are characteristics of prokaryotic cells? (a) Ribosomes are made of 50S and 30S subunits (b) They can have plasmids (c) They contain mesosome (d) They have peroxisomes. Choose the correct answer from the options given below:
(A) (a), (b) and (c) only
(B) (b) and (c) only
(C) (a) and (c) only
(D) (a), (c) and (d) only
Prev Next
Correct Answer: A

AI Tutor Explanation

Powered by Gemini

Detailed Solution

Step 1: Analyze Statement (a)

Prokaryotic ribosomes are of the 70S type, which are composed of two subunits: a larger 50S subunit and a smaller 30S subunit. This statement is correct.

Step 2: Analyze Statement (b)

Many prokaryotes, especially bacteria, contain small, circular, extrachromosomal DNA molecules known as plasmids, which provide unique phenotypic characters like antibiotic resistance. This statement is correct.

Step 3: Analyze Statement (c)

Mesosomes are characteristic infoldings of the plasma membrane in prokaryotes, which help in cell wall formation, DNA replication, and respiration. This statement is correct.

Step 4: Analyze Statement (d)

Peroxisomes are membrane-bound organelles found in eukaryotic cells. Prokaryotes lack membrane-bound organelles such as mitochondria, lysosomes, and peroxisomes. This statement is incorrect.

Step 5: Conclusion

Since (a), (b), and (c) are correct, the correct option is (A).

Final Answer: (A)

AI generated content. Review strictly for academic accuracy.

Pedagogical Audit
Bloom's Analysis: This is an APPLY question because the student must recall specific structural features of prokaryotes and apply that knowledge to evaluate the validity of multiple distinct biological statements.
Knowledge Dimension: CONCEPTUAL
Justification: The question tests the understanding of the fundamental organizational differences between prokaryotic and eukaryotic cellular architecture.
Syllabus Audit: In the context of NEET, this is classified as COMPETENCY. It requires the student to synthesize information across different sub-topics of the Cell: The Unit of Life chapter to eliminate incorrect options.

More from this Chapter

MCQ_SINGLE
Arrange the following in descending order of number of species in the Amazonian rain forest. (a) Plants (b) Birds (c) Fishes (d) Invertebrates (e) Mammals Choose the correct answer from the options given below:
MCQ_SINGLE
The formula of tetraammineaquachloridocobalt(III) chloride is
MCQ_SINGLE
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: The first ionization enthalpy of O is lower than that of N and F. Reason R: The loss of an electron from O leads to stable half-filled p orbital. In light of the above statements, choose the most appropriate answer from the options given below:
MCQ_SINGLE
Two infinitely long parallel conducting wires A and B carry currents $I$ and $2I$, respectively, in the same direction. The wire A has uniform mass per unit length $\lambda$ and lies on an insulated floor. The wire B is kept fixed at a height $h$ above the floor. The minimum magnitude of $h$ so that the wire A does not rise from the floor is: [$g$ is the acceleration due to gravity and $\mu_{0}$ is the permeability of free space.]
MCQ_SINGLE
Given below are two statements: Statement I: When any plane passing through the central axis of the body divides the organism into two identical halves, it is called radial symmetry. Statement II: In phylum Echinodermata, both adults and larvae are radially symmetrical. In the light of the above statements, choose the most appropriate answer from the options given below:
View All Questions