MEDIUM
12th Uttar Pradesh Board
IMPORTANT
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Apis mellifera are killer bees possessing toxic bee venom.  Identify the treatment and the type of immunity developed from the given table to treat a person against the venom of this bee. 

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Important Questions on Sample Paper 1

MEDIUM
12th Uttar Pradesh Board
IMPORTANT
Interferons are most effective in making non-infected cells resistant against the spread of which of the following diseases in humans?
MEDIUM
12th Uttar Pradesh Board
IMPORTANT

Which of the following water samples in the table given below, will have a higher concentration of organic matter?   

Water Sample Level of pollution  Value of BOD 
(a) High High
(b) Low Low
(c) Low High
(d) High Low
MEDIUM
12th Uttar Pradesh Board
IMPORTANT

The figure below shows the structure of a plasmid.   

Question Image

A foreign DNA was ligated at BamH1. The transformants were then grown in a medium containing antibiotics tetracycline and ampicillin.  Choose the correct observation for the growth of bacterial colonies from the given table  

  Medium with Tetracycline  Medium with  Ampicillin
(a) Growth No growth 
(b) No growth  Growth
(c) No growth  No growth 
(d) Growth Growth
HARD
12th Uttar Pradesh Board
IMPORTANT
Swathi was growing a bacterial colony in a culture flask under ideal laboratory conditions where the resources are replenished. Which of the following equations will represent the growth in this case?  (Where population size is N, birth rate is b, death rate is d, unit time period is t, and carrying capacity is K). 
MEDIUM
12th Uttar Pradesh Board
IMPORTANT
Sea Anemone gets attached to the surface of the hermit crab. The kind of population interaction exhibited in this case is
MEDIUM
12th Uttar Pradesh Board
IMPORTANT
Which of the following food chains is the major conduit for energy flow in terrestrial and aquatic ecosystems respectively? 
MEDIUM
12th Uttar Pradesh Board
IMPORTANT
Which of the following is an example of ex situ conservation?
MEDIUM
12th Uttar Pradesh Board
IMPORTANT

In the figure given below, parts A and B show the level of hormones which influence the menstrual cycle. Study the figure and answer the questions that follow:

Question Image

Name the organs which secrete the hormones represented in parts A and B.