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Recent questions tagged sec-a
Questions
The central pollution control board observed that a thermal power plant is emitting 80% of its particulate matter in the exhaust due to poor maintenance? What could be the cause for this increase in % of particular matter?
cbsc
class 12
biology
environmental issues
sec-a
asked
Apr 11, 2019
by
priyanka.clay6
1
answer
Why is a scrubber used? Which spray is used on exhaust gases passing through a scrubber?
cbsc
class 12
biology
environmental issues
sec-a
asked
Apr 11, 2019
by
priyanka.clay6
1
answer
Motor vehicles with catalytic converter should use unleaded petrol. Why?
cbsc
class 12
biology
environmental issues
sec-a
asked
Apr 11, 2019
by
priyanka.clay6
1
answer
The birds egg shells become thinner in an area where there is an excess application of pesticides. Comment.
cbsc
class 12
biology
environmental issues
sec-a
asked
Apr 11, 2019
by
priyanka.clay6
1
answer
Mention the information that the health workers derive by measuring BOD of a water body.
cbsc
class 12
biology
environmental issues
sec-a
asked
Apr 11, 2019
by
priyanka.clay6
1
answer
Why should the velocity of air between the plates of an electrostatic precipitator be low?
cbsc
class 12
biology
environmental issues
sec-a
asked
Apr 11, 2019
by
priyanka.clay6
1
answer
How does the man made ecosystem differ from the natural ecosystem?
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
What is stratification in a forest?
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
How is a food web formed?
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Which metabolic process causes a reduction in the Gross Primary Productivity?
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
If we count the number of insects on a tree and number of small birds depending on those insects as also the number of larger bird eating the smaller, what kind of pyramid of number would we get?
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Decomposition is faster if deteritus is rich in nitrogen and water soluble substance like sugars. When is decomposition slower?
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Write the equation that helps in deriving the net primary productivity of an Ecosystem
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Sedimentary cycle is quite different from a gaseous cycle with respect to its reservoir. Bring out the difference.
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
In burnt out Forests and flooded lands succession takes place faster. Why?
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
As succession proceeds the numbers and types of animals and decomposers also change. How?
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
The detritus food chain and grazing food chain differ. How?
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Can temperature regulate the rate of decomposition how?
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Detritus contribute to the biogeochemical cycles, how?
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
All the primary productivity is not available to the herbivore,give one reason.
cbsc
class 12
biology
ecosystem
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
What are the two main processes involved in downstream processing?
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
What is a bioreactor?
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Name the microorganism from which the thermostable DNA polymerase required for PCR is obtained?
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Expand the term PCR.
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Name any two processes by which alien DNA is introduced into the host cell.
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Mention the bacteria that acts as natural genetic engineer.
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Name the sequence within a cloning vector from where the replication commences.
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
What are cloning vectors ?
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
What is elution?
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Which enzymes act as molecular glue?
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
What do you mean by recognition sequence?
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
What are molecular scissors?
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Define plasmid.
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
What is biotechnology ?
cbsc
class 12
biology
biotechnology : principles and process
sec-a
asked
Apr 10, 2019
by
priyanka.clay6
1
answer
Thermostable DNA polymerase is needed in amplification? Why?
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Eukaryotic organisms do not have restriction endonuclease. What is its role in prokaryotes?
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Out of 51 amino acids in insulin. How many amino acids present in chain A and B.
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Name the Genetically engineered human insulin. How many amino acids are present in it?
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Bioreactors are important aspect of Bio technology. How?
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Which enzyme is used to remove phosphate group from the 5’ end of a DNA molecule
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Does your blood have proteases and nuclease? If so what is its function?
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
What is golden rice ?
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Can you recall meiosis and indicate at what stage a recombinant DNA in made?
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
What is common in the recognition sequence of all the organisms and strains, which are recognized by restriction enzymes.
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Give the term for increasing the content of gene.
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Give the term for replacing a defective mutant allele with a functional allele.
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Give the term for rDNA, PCR and ELISA have common value.
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
State the principle used in ELISA?
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
Name the diagnostic test for AIDS when the concentration of HIV is (a) low (b) high.
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
PCR is a powerful diagnostic technique. Justify.
cbsc
class 12
biology
biodiversity and its applications
sec-a
asked
Apr 9, 2019
by
priyanka.clay6
1
answer
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