quiz of PCMB 05 jan tarun pant

1.       Carbon exists in the atmosphere in the form of

• carbon monoxide only

• carbon monoxide in traces and carbon dioxide

• carbon dioxide only

•  Coal

1.       Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?

•      A, B, C

•    B, C, D

•       A, D, E

•       B, D, E

1.       Assertion: Characteristics of parental plants can be preserved through asexual reproduction.

Reason: Vegetative reproduction involves only mitosis

•     A is true but R is false.

•     Both A and R are true and R is the correct explanation of A.

• A is false but R is true.

•   Both A and R are true but R is not the correct explanation of A.

•    Both A and R are false.

      Two pea plants one with round green seeds (RRyy) and another with wrinkled yellow (rrYY) seeds produce F1 progeny that have round, yellow (RrYy) seeds. When F1 plants are selfed, the F2 progeny will have new combination of characters. Choose the new combination from the following.

                        i.            Round, yellow

                       ii.            Round, green

                              iii.             Wrinkled, yellow

                             iv.             Wrinkled, green

• (i) and (ii)

• (i) and (iv)

• (ii) and (iii)

• (i) and (iii)

     Identify the Mg2+ ion from the Fig.4.1 where, n and p represent the number of neutrons and protons respectively

• 
• 
• 
• 

      While doing work and running, you move your organs like hands, legs etc. Which among the following is correct?

•       Smooth muscles contract and pull the ligament to move the bones

•       Smooth muscles contract and pull the tendons to move the bones

•   Skeletal muscles contract and pull the ligament to move the bones

•      Skeletal muscles contract and pull the tendon to move the bones

1.       In the given Figure the various trophic levels are shown in a pyramid. At which trophic level is maximum energy available?

•      T4

• T2

• T1

• T3

   The pH of water sample collected from a river was found to be acidic in the range of 3.5 – 4.5, on the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely cause for lowering the pH of river water?

• Soap and detergent factory

•   Lead battery manufacturing factory

•   Plastic cup manufacturing factory

• Alcohol distillery

•                                          (i) 

•     (i) and (iv)               

• (ii) and (iii) 

• (ii) and (iv)

Choose the correct options from below:

• A-r, B-p, C-t, D-s, E-q

•       A-p, B-q, C-s, D-t, E-r

•      A-q, B-r, C-p, D-s, E-t

•     A-t, B-s, C-q, D-r, E-p