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A: A virus attacking a bacterium is call...

A: A virus attacking a bacterium is called bacteriophage.
R: A virus attacking blue green algae is called cyanophage 

A

A and R both are correct and R is correct explanation of A.

B

A and R are correct but R is not explanation of A.

C

A is correct and R is false.

D

A and R are false

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The correct Answer is:
B
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Path traced by a moving particle in space is called trajectory of the particle. Shape of trajectiry is decided by the forces acting on the particle. When a coordinate system is associated with a particle motion, the curve equation in which the particle moves [y=f(x)] is called equation of trajectory. It is just giving us the relation among x and y coordinates of the particle i.e. the locus of particle. To find equation of trajectory of a particle, find first x and y coordinates of the particle as a function of time eliminate the time factor. The position vector of car w.r.t. its starting point is given as vec(r)=at hat(i)- bt^(2) hat(j) where a and b are positive constants. The locus of a particle is:-

Path traced by a moving particle in space is called trajectory of the particle. Shape of trajectiry is decided by the forces acting on the particle. When a coordinate system is associated with a particle motion, the curve equation in which the particle moves [y=f(x)] is called equation of trajectory. It is just giving us the relation among x and y coordinates of the particle i.e. the locus of particle. To find equation of trajectory of a particle, find first x and y coordinates of the particle as a function of time eliminate the time factor. In above question initial acceleration (i.e. (d^(2)vec(r))/(dt^(2))) of particle is :-

Path traced by a moving particle in space is called trajectory of the particle. Shape of trajectiry is decided by the forces acting on the particle. When a coordinate system is associated with a particle motion, the curve equation in which the particle moves [y=f(x)] is called equation of trajectory. It is just giving us the relation among x and y coordinates of the particle i.e. the locus of particle. To find equation of trajectory of a particle, find first x and y coordinates of the particle as a function of time eliminate the time factor. In above the velocity (i.e. (dvec(r))/(dt)) at t=0 is :-

Pick up the correct option Bacteriophages are virus that infect bacteria/bacteria that infect virus.

KUMAR PRAKASHAN-BIOLOGICAL CLASSIFICATION-OBJECTIVE SECTION (MULTIPLE CHOICE QUESTIONS : (MCQs))
  1. Which bacteria are the most abundant in nature ? (A) Heterotrophic ...

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  2. All single-celled eukaryotes are placed under  (A) Fungi (B) Proti...

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  3. The spores of slime moulds possess  (A) False walls (B) True wall...

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  4. The sea appears red due to rapid multiplication of  (A) Euglenoids ...

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  5. What is true for all protozoans ? (A) are heterotrophs (B) they a...

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  6. Chrysophytes which are the chief producers in the ocean?

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  7. Sleeping sickness is caused by  (A) Wuchereria (B) Amoeba (C) ...

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  8. Which is the parasitic fungi on mustard ? (A) Rhizopus (B) Mucor ...

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  9. Amoeboid protozoans are found in

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  10. Fungus used extensively in biochemical and genetic work  (A) Neurosp...

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  11. Which fungi is commonly known as imperfect fungi? (A) Basidiomycetes...

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  12. Viroids are  (A) parasitic DNA (B) free RNA (C) free DNA (D...

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  13. Which of the following is indicator of pollution ?  (A) Viroids (...

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  14. Colletotrichum belongs to  (A) Deuteromycetes (B) Ascomycetes ...

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  15. Rusts and smuts belongs to  (A) Deuteromycetes (B) Basidiomycetes...

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  16. A: Rhizopus does not form zygospores R: It shows heterothallism

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  17. A: A virus attacking a bacterium is called bacteriophage. R: A virus...

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  18. A: Bacteria, cyanobacteria and mycoplasma are prokaryotes R : Prokar...

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  19. A : Phycomycetes are generally called algal fungi. R: It is believed...

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  20. A : Mushrooms are not regarded plants. R : Unlike plants mushrooms a...

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