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CBSE PORTAL : (Download) CBSE Class-12 Sample Paper And Marking Scheme 2017-18 : Biology

CBSE PORTAL : (Download) CBSE Class-12 Sample Paper And Marking Scheme 2017-18 : Biology

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(Download) CBSE Class-12 Sample Paper And Marking Scheme 2017-18 : Biology

Posted: 19 Jan 2018 10:22 PM PST

(Download) CBSE Class-12 Sample Paper And Marking Scheme 2017-18 : Biology

General Instructions:
1. There are a total of 26 questions and five sections in the question paper. All questions are compulsory.
2. Section A contains question number 1 to 5, Very Short Answer type questions of one mark each.
3. Section B contains question number 6 to 10, Short Answer type I questions of two marks each.
4. Section C contains question number 11 to 22, Short Answer type II questions of three marks each.
5. Section D contains question number 23, Value Based Question of four marks.
6. Section E contains question number 24 to 26, Long Answer type questions of five marks each.
7. There is no overall choice in the question paper, however, an internal choice is provided in one question of two marks, one question of three marks and all three questions of five marks. An examinee is to attempt any one of the questions out of
the two given in the question paper with the same question number.

Section – A

1. A tissue, of a tobacco plant, infected with TMV was used to obtain a new plant. Identify the technique used and reason out the possibility of obtaining a new healthy plant. 1
2. State a method of cellular defense which works in all eukaryotic organisms 1
3. In case of an infertile couple, the male partner can inseminate normally but the mobility of sperms is below 40 percent. Which kind of ART is suitable in this situation to form an embryo in the laboratory conditions, without involving a donor? 1
4. Write the two components of the first artificial recombinant DNA molecule constructed by Cohen and Boyer.1
5. A cross was carried out between two pea plants showing the contrasting traits of height of the plant. The result of the cross showed 50% of parental characters. Name the type of cross. 1

Section B

6. The alarming population growth is leading to scarcity of basic requirements. Suggest with reasons, any two population control measures other than contraception to address the situation.

7. During a cytological study conducted on the chromosomes of the insects, it was observed that only 50% of the sperms had a specific structure after spermatogenesis. Name the structure and write its significance in sex determination of insects.2
8. To reduce the percentage of population suffering from hunger and malnutrition, microbes are grown on a large scale to act as food supplements. Mention any two microbes used as food supplement and suggest their role.
OR
Success rate of artificial insemination in cattle is fairly low. Identify any other technique to improve the successful production of hybrids. State two advantages of this technique. 2
9. (a) A patient who had an organ transplant was given cyclosporin– A. Mention the microbial source and state the reason for administration of this bioactive molecule.
(b) Bottled fruit juices bought from the market are clearer as compared to those made at home. Give reason. 2
10. Evaluate the effect of loss of biodiversity in a region. Mention any four such effects. 2

Section C

11. Draw the diagram of microsporangium of an Angiosperm and label any four parts State the function of its innermost wall layer. 3
12. Give reason : -
(a) A liverwort plant is unable to complete its life cycle in a dry environment.
(b) Number of male gametes produced is much more than the female gametes produced.
(c) Organisms exhibiting external fertilization show great synchrony between the sexes and release a large number of gametes into surrounding medium. 3
13. (a) Name the different gases contained in the flask used as an experimental setup by S.L. Miller.
(b) On the basis of composition of gases in this experiment, what was the condition in the flask?
(c) Write the conclusion drawn from this experiment. 3
14. When a snapdragon plant bearing pink colour flower was selfed, it was found that, 69 plants were having red coloured flowers. What would be the number of plants bearing pink flower and white flower. Show with the help of Punnett square. Identity the principle of inheritance involved in this experiment

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CBSE (Class XII) Previous Year Papers Printed Books

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(Download) CBSE Class-10 Sample Paper And Marking Scheme 2017-18 : Elements of Business

Posted: 19 Jan 2018 10:21 PM PST

(Download) CBSE Class-10 Sample Paper And Marking Scheme 2017-18 :

Elements of Business

Q. No.

Question

Marks

1

Which  of the following is not a feature of personal selling:

a) develop personal relationship with customer b) personal form of communication

c) flexible tool of promotion

d) communicated through some media

1

2

                         are considered as a cushion of security.

a) Equity        b) Debentures     c) Retained Earnings     d) Trade Credit

1

3

Exchange of information between sender and receiver is known as:

a) Directing   b) Controlling    c) Organising    d) Communication

1

4

Centralised control in MNC’s implies control exercised by

a) Headquarters    b) Government    c) Branches  d) Subsidiaries

1

5

Document that is sent by the seller to a potential customer offering to sell goods

or services at a certain price is known as:

a) Debit note     b) Credit note    c) Quotation       d) Accounts Payable

1

6

Debentures are                              type of capital of a company.

a) Fluctuating      b) borrowed     c)Permanent     d) Fixed

1

7

Invoice is prepared by                                          in case of sale of goods

a)   Buyer     b) Seller   c) Bank      d) Lender

1

8

Delhi Cloth Mills (DCM) Store is an example of which of the following:

a) Mail Order House          b) Multiple Shops c) Departmental Stores       d) Super Markets

1

9

The process of communication is incomplete without                   

a) Rumours     b)Feedback    c) Encoding    d) Decoding

1

10

Which of the following is a type of Non- store retailing

a)   Consumer Cooperative Store         b) Selling through internet c)   Franchisee                                       d) Chain stores

1

11

Which of the following is an impersonal form of communication?

a) Advertising       b) Marketing       c) Personal Selling      d) Promotion

1

12

Reliance Jio distributed free sim cards for enhancing its customer base. Which

promotion technique did the company adopt?

a) Contests       b) Sampling         c) Lucky draw       d) Rebate

1

13

                                           is not a feature of a departmental store.

a)   Centralised location          b) Wider Range

c)   Central purchases             d)  Specialised in one line product

1

14

                        is an association of persons formed for carrying out business

activities and has a legal status independent of its members is known as:

a) Joint Hindu  Family                              b) Partnership c) Consumer Cooperative society             d) Company

1

15

Equity shareholders are called

(a) Owners of the company       (b) Partners of the company

(c) Debtors of the company       (d) Creditors of the company

1

16

Signature of a company is known as :

a) Trademark of the company    b) Logo of the company

c) common seal                          d)  signature of the director

1

17

Equity share capital is a permanent source of finance. Explain

3

18

State any three limitations of Mail Order Business.

3

19

Briefly explain Radio as a media of advertising.

3

20

‘Multinational Corporation creates employment in the host country’. Do you

agree with the given statement? Give valid reasons in support of your answer.

3

21

Define Advertising. State any three difference between Advertising and

Personal selling.

4

22

Explain the preferential rights enjoyed by Preference Shareholders over Equity

Shareholders.

4

23

Discuss how a buyer can exercise the methods of ‘purchase by sample’ and

‘purchase by inspection’.

4

24

Discuss the role of sender and receiver in the communication process under a

business organisation.

4

25

‘No business organisation can imagine communication activities without

telephone in the modern times’. Elaborate the given statement in the light of the present day communication methodologies.

4

26

State the steps involved in selling procedure.

4

27

Automatic Vending Machine is a new and innovative way of direct retailing.

In the light of given statement state the advantages of Automatic vending machine.

4

28

State any four features of a multinational corporation.

4

29

Distinguish between public and private company on the basis of the following:

a.   Number of members   b. Prospectus           c. Number of directors d.   Transfer of shares       e. Minimum paid up capital

5

30

Explain any two sources of owner’s fund that can be used for raising finance by

a business organisation.

5

31

‘Video Conferencing has been growing rapidly as a method of communication

for the present day business organisations’. Discuss the advantages of the method in the light of the given statement.

5

32

Discuss briefly the following :

a) Debit Note b) Credit Note

5

33

Write short notes on :-

a.   Email b.   Letter

5

34

Explain the following two methods of purchase of goods:-

a) Instalment Method             b) Hire Purchase Method

5

35

Give any five point of distinction between Departmental and Chain Stores.

5

36

Discuss briefly the following techniques of sales promotion, with suitable

examples:

a) Rebate     b) Discount       c) Refund   d) Contest    e) Lucky Draw

5


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CBSE (Class X) Previous Year Papers Printed Books

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