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www.CBSEPORTAL.COM - : (Download) CBSE Class-12 2016-17 Sample Paper And Marking Scheme (Biotechnology)

www.CBSEPORTAL.COM - : (Download) CBSE Class-12 2016-17 Sample Paper And Marking Scheme (Biotechnology)

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(Download) CBSE Class-12 2016-17 Sample Paper And Marking Scheme (Biotechnology)

Posted: 20 Dec 2016 04:09 AM PST

(Download) CBSE Class-12 2016-17 Sample Paper And Marking Scheme (Biotechnology)


Time: 3 Hours

Max. Marks: 70

General Instructions

  • All questions are compulsory

  • Question paper consists of 4 sections A,B,C and D

  • Question numbers 1 to 6 are very short answer questions each carrying one mark

  • Question numbers 7 to 14 are short answer questions each carrying two marks

  • Question numbers 15 to 25 are also short answer questions each carrying three marks

  • Question numbers 26 to 28 are long answer questions each carrying five marks

  • There is no overall choice. However an internal choice has been provided in one question of three marks and two questions of five marks. You have to attempt only one of the choices in such questions.

  • Use of calculators is not permitted. However, you may use log tables, if necessary.

Section A

1. How is oxygen provided in fermentors? 1

2. Why is a pilot plant essential in microbial culture works? 1

3. As a biotechnologist, what would you suggest to a farmer for successful pollination or fertilization in plants.

4. Why do plant cells in culture require nutrient media for growth. 1

5. Why is splitting of animal cells essential? 1

6. Name the first drug to be produced by mammalian cell culture? 1

Section B

7. Which type of restriction enzymes are used in RDT and why? 2

8. Explain in brief any two types of non-covalent interactions found in proteins.

9. Which type of DNA library would you prefer for liver cells. Give proper explanation for making such a library.

10. How can you maximize protein stability during purification?Write any two parameters for the same.

11. Number of genes is not related to the complexity of an organism.Give reasons.12. Calculate the generation time of a bacterial population in which the number of bacteria increase from 104 /ml to 107/ml during four hours of exponential growth.

13. Ti plasmid vector of Agrobacteriuntumefaciens is disarmed.Where is the gene of interest incorporated in Ti plasmid?

14. Why are serum and antibiotics essential as growth supplements for animal cells in culture?

Section C

15. How are pUC 19 vectors used for the selection of recombinants? 3

16. Yeast cells have been transformed with Yep vector containing our gene of interest. How would you select the recombinants over cells not containing the plasmid?

17. Describe the principle of MALDI technique. Write its two main uses in protein studies.
OR
What are the principles behind Iso electric focusing and SDS PAGE techniques? Why is 2D electrophoresis better than single dimension electrophoresis?

18. How is an extracellular protein purified from a fermentation medium? Illustrate the steps with a flowchart.

19. What are SNPs?Explain the relevance of studying these citing any two of their important applications.

20.Graphically differentiate between fed batch and continuous cultures.
Which type of culture system is most suitable for obtaining maximum amount of cellular products?

21. How does the metagenomics approach help to identify novel genes present in the environment? Explain the process.

22. What are edible vaccines? How are they better than conventional vaccines?Give any two points.

23. What are somatic hybrids?How are they produced? 3

24. Give a brief outline of the technique for production of monoclonal antibodies.Why are monoclonal antibodies preferred over serum antibodies in diagnostics and therapeutics?

25. How would you scale up kidney cells grown in culture?

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(Download) CBSE Class-12 2016-17 Sample Paper (Business Studies)

Posted: 20 Dec 2016 04:06 AM PST

(Download) CBSE Class-12 2016-17 Sample Paper (Business Studies)


Time allowed: 3 hours

Maximum marks: 80

General Instructions:

i. Answer to questions carrying 1 marks may be from one word to one sentence.
ii. Answer to questions carrying 3 marks may be from 50-75 words.
iii. Answer to questions carrying 4-5 marks may be about 150 words.
iv. Answer to questions carrying 6 marks may be about 200 words.
v. Attempt all parts of a question together.

1 What did Taylor want to communicate through mental revolution? 1 R 1

2 What is meant by span of management? 1 R 2

3 Super Fine Rice Ltd. has the largest share of 55% in the market. The company's policy is to sell only for cash. In 2015, for the first time company's number one position in the industry has been threatened because other companies started selling rice on credit also. But the managers of Super Fine Rice Ltd. continued to rely on it's previously tried and tested successful plans which didn't work because the environment is not static. This led to decline in sales of Super Fine Rice Ltd. The above situation is indicating two limitations of planning which led to decline in it sales. Identify these limitations.

4 Why is it said that directing takes place where ever superiorsubordinate relationship exists?

5 When is financial leverage favourable?

6 ABC Ltd. issued prospectus for the subscription of its shares for ` 500 crores in 2008. The issue was oversubscribed by 20 times. The company issued shares to all the applicants on pro-rata basis. Later SEBI inspected the prospectus and found some misleading statement about the management of the company in it. SEBI imposed a penalty of ` 5 crores and banned its three executive directors for dealing in securities market for three years.

Identify the function and its type performed by SEBI in the above case.

7 Ronit Raj, a marketing manager is a patient of diabetes for which he takes medicines regularly. One day, on his tour to Patna, he met with an accident and was hospitalised. Due to doctors‟ negligence a delicate nerve of his right leg was cut rendering hum crippled throughout his life. Identify the consumer right that has been violated by the doctors under the Consumer Protection Act, 1986 in the above situation.

8 Sirajuddin purchased a car for `15 lacs from an automobile company and found that its airbags were defective. After many complaints with the company that went unheard, he filed a case in the District Forum. He was not satisfied with the orders of the District Forum. He then appealed before the State Commission and on being dissatisfied with the orders of State Commission, he appealed before the National Commission. Sirajuddin was not satisfied with the orders of National Commission. Suggest him the highest authority where he could appeal against the decision of the National Commission.

9 State the main aspects in the concept of planning? 3 R 2 10 How does controlling help in "Judging accuracy of standards" and "Ensuring order and discipline."

11 M/s Beta Ltd. deals in consumer goods. It employs 100 workers and 10 operative managers who give guidance and support to the workers while operating the machinery. The company has a policy of granting leave as per the requirement of the workers. Workers are generally granted leave on festivals and special occasions. Recently on Puja festival, it received a big order. Workers are keen to take Puja holidays while management is pressing hard for overtime. This matter was placed before the Personnel Manager who called the meeting of operative managers and workers to inform them about the changes in the incentive plan which states payment of double wages for working overtime and triple wages for working on holidays. Workers without any pressure voluntarily took limited holidays and were able to increase their earning by working overtime and on holidays. During Board of Directors meeting, Personnel Manager was asked to update the management for achieving higher output, meeting timely supplies without any confrontation with workers. Personnel Manager replied, "I just used a carrot with no sticks approach". By quoting the lines from above paragraph state any two elements f directing.

 

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(Download) CBSE Class-12 2016-17 Sample Paper And Marking Scheme (Computer Science)

Posted: 20 Dec 2016 03:32 AM PST

(Download) CBSE Class-12 2016-17 Sample Paper And Marking Scheme (Computer Science)


Time: 3Hrs.

MM: 70

Instructions:

i. All Questions are Compulsory.
ii. Programming Language : Section – A : C++
iii. Programming Language : Section – B : Python
iv. Answer either Section A or B and Section C is compulsory

Section – A

1 (a) Explain conditional operator with suitable example? 2
(b) Which C++ header file(s) are essentially required to be included to run/execute the following C++ code :
void main()
{
char *word1="Hello",*word2="Friends";
strcat(word1,word2);
cout<<word1;
}
1
(c) Rewrite the following program after removing the syntactical errors
(if any). Underline each correction.

#include<conio.h>
#include<iostream.h>
#include<string.h>
#include<stdio.h>
class product
{
int product_code,qty,price;
char name[20];
public:
product()
{
product_code=0;qty=0;price=0;
name=NULL;
}
void entry()
{
cout<<"\n Enter code,qty,price";
cin>>product_code>>qty>>price;
gets(name);
}
void tot_price() {return qty*price;}
};
void main()
{
p product;
p.entry();
cout<<tot_price();
}

(d) Write the output of the following C++ program code:

Note: Assume all required header files are already being included in the program.

void change(int *s)
{
for(int i=0;i<4;i++)
{
if(*s<40)
{
if(*s%2==0)
*s=*s+10;
else
*s=*s+11;
}
else
{
if(*s%2==0)
*s=*s-10;
else
*s=*s-11;
}
cout<<*s<<" ";
s++;
}
}
void main()
{
int score[]={25,60,35,53};
change(score);
}
 

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