Plant Anatomy And Physiology - Study Mode

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[#261] Consider the following statements and choose the correct answer: 1. Preparations of tRNA from plant sources contain cytokinins 2. Cytokinins most likely influence protein synthesis through their involvement in the attachment to tRNA to the ribosome-mRNA complex during protein synthesis 3. The synthetic cytokinins 6-BAP and kinetin influence the production of viruses in certain host systems

(A) Only 1 and 2 are true

(B) Only 2 and 3 are true

(C) Only 1 and 3 are true

(D) 1, 2 and 3 are true

Correct Answer

(D) 1, 2 and 3 are true

[#262] The most important method of conservation of pollutants is

(A) Oxidation in air

(B) Chemical neutralisation of acids

(C) Chemical neutralisation of bases

(D) Burning of wastage materials

Correct Answer

(A) Oxidation in air

[#263] According to Hansel, which of the following ranges of temperature is equally efficient in shortening the number of days to flowering in Petkus winter rye?

(A) 10° to 20° C

(B) 1° to 7° C

(C) 7° to 15° C

(D) Below -4° C

Correct Answer

(B) 1° to 7° C

[#264] The organisms which secrete digestive enzymes to break down food into smaller substances and then absorb the digested food are known as

(A) Osmotrophs

(B) Phagotrophs

(C) Autotrophs

(D) Carnivores

Correct Answer

(A) Osmotrophs

[#265] Which of the following non-succulent perennials shed their leaves soon after the rainy season is over?

(A) Euphorbia

(B) Agropyron

(C) Amnophila

(D) None of the above

Correct Answer

(A) Euphorbia