Viroids have
- single stranded RNA not enclosed by protein coat
- single stranded DNA not enclosed by protein coat
- double stranded DNA enclosed by protein coat
- double stranded RNA enclosed by protein coat
The Correct Option is A
Solution and Explanation
Top Questions on biological classification
- Red Data Book describes
- WBJEE JENPAS UG - 2022
- Biology
- biological classification
- Which of the following statements is correct?
- NEET (UG) - 2021
- Biology
- biological classification
- Match the compounds of Column I with their functions in Column II.
Column I Column II 1. Trypsin p. Fights infectious agents 2. GLUT - 4 q. Is an intercellular ground substance 3. Collagen r. Works as an enzyme 4. Antibody s. Enables glucose transport into cells - KCET - 2021
- Biology
- biological classification
- Match the organisms in column-I with habitats in column-II Select the correct answer from the options given below :-
- NEET (UG) - 2019
- Biology
- biological classification
- Match Column - I with Column - II.
Column - I Column - II Saprophyte - Symbiotic association of fungi with plant roots Parasite - Decomposition of dead organic materials Lichens - Living on living plants or animals Mycorrhiza - Symbiotic association of algae and fungi Choose the correct answer from the options given below :- NEET (UG) - 2019
- Biology
- biological classification
Questions Asked in AIIMS exam
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : 02 is liberated in the non-cyclic photophosphorylation.
Reason (R) : Liberation of oxygen is due to photolysis of water.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- Photosynthesis in higher plants
- Match the following column I with column II.
- AIIMS - 2019
- cloning
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : The Cro-Magnon man was the direct ancestor of the living modern man.
Reason (R) : Cro-Magnon man had slightly prognathous face.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- evolution
- Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion: Orbit of a satellite is within the gravitational field of earth whereas escaping is beyond the gravitational field of earth.
Reason: Orbital velocity of a satellite is greater than its escape velocity.
In the light of the above statements, choose the correct answer from the options given below- AIIMS - 2019
- Gravitation
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion (A) : In eukaryotes, transcription occurs in nucleus.
Reason (R) : In bacteria, transcription and translation occurs in cytoplasm.
In the light of the above statements, choose the correct answer from the options given below
- AIIMS - 2019
- Transcription
Concepts Used:
Biological Classification
The process of grouping living organisms into categories is called biological classification. The most modern 5-kingdom classification was put ahead by an eminent scientist R.H.Whittaker. The five-kingdom classification is based on the criteria like cell structure, mode of nutrition, body form, and reproduction. One of the most important characteristics of this system is that it follows the evolutionary sequence of living organisms. The organisms are classified into distinct taxa or levels like Kingdom, Phylum, Division, Class, Order, Family, Genus, and Species. The 5 kingdoms are as follows:
