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Select correct answer according to code
What is true for archaebacteria
Extreme halophiles ,extreme thermophiles, Methanogens , Occurrence of peptidoglycan in cell wall.

A

All Halophills

B

All photosynthetic

C

All fossils

D

Oldest living beings

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The correct Answer is:
D
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Which of the following are true of archaebacteria? Presence of peptidoglycan cell wall Strict aerobes First amino acid in protein synthesis is methionine Includes methanogens .

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Select the correct combination of the statements (i-iv) regarding the characteristics of certain organisms. (i) Methanogens are archaebacteria which produce methane in marshy areas (ii) Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen (iii) Chemosnthetic autotrophic bacteria synthesise cellulose from glucose (iv) Mycoplasma lack a cell wall and can survive without oxygen The correct statements are

Archaea differ from bacteria in that they : (a) can form methanogen (b) have different rRNA sequences (c) do not have peptidoglycan in their cell walls (d) all of the above are correct

Select the correct answer out of the four available choices given under question : The space between the cell wall and plasma membrane in plasmolysed cell is filled with: (i) isotonic solution (ii) hypotonic solution (iii) hypertonic solution (iv) water

Select correct answers and mark the code Cells regulate their activity through 1. Flow of energy 2. Flow of materials 3. Flow of information 4. Flow of smoke (A) 1, 2, 3 correct (B) 1 and 2 correct (C) 2 and 4 correct (D) 1 and 3 correct

Consider the following four statements (i) - (iv) and select the correct option stating which ones are true (T) and which ones are false (F) (i) The epithelium of proximal convoluted tobule (PCT) of nephron in the kidney has microvilli (ii) Simple epithelium covers the dry surface of the skin, the moist surface of buccal cavity, pharynx, inner lining of salivary glands and of pancreatic ducts (iii) The wall of internal organs such as the blood vessels, stomach and intestine contains skeletal muscle (iv) Bone marrow in some bones is the site of production of blood cells.

Read the following statements about hindbrain. Identify whether they are true or false and select the correct option after referring to the given table . A. The hindbrain consists of pons, cerebellum, and medulla. B. The surface of the cerebellum is extremely convoluted. C. The medulla consists of fibres that interconnect different regions of the brain. D. Pons consists of centers that control respiration, gastric secretions , etc.

ALLEN-ORIGIN & EVOLUTION OF LIFE-EXERCISE-I (ORIGIN OF LIFE)
  1. Oxygen in atmosphere has been formed by:

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  2. Assertion: Primitive atmosphere was of reducing type. Reason: First ...

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  3. Who called larger colloidal particles of primitives sea as coacervates...

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  4. Who called water of primitive sea as pre biotic soup?

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  5. Oparin's theory about "Origin of life" is based upon the idea of

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  6. Which biologist gave most logical biochemical theory of origin of life...

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  7. During the course of origin of life what was the sequence of substance...

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  8. The first organisms are believed to be

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  9. A compound having very important role in prebiotic evolution was

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  10. Under certain conditions, scientists have got cell-like structures but...

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  11. An experiment to prove that organic compounds were the basis of life w...

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  12. Discovery of which of the following in 1980 predicted the existence of...

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  13. Select correct answer according to code What is true for archaeb...

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  14. First life form on earth was a

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  15. There is no life on moon due to the absence of -

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  16. During the origin and evolution of life, key biological compounds were...

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  17. Big bang theory was proposed by

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  18. Miller and Urey performed an experiment to prove the origin of life. T...

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  19. Abiogenesis is

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  20. Most modern hypothesis regarding origin of life was given by :

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