| (Download) CBSE Class-10 Sample Paper And Marking Scheme 2019-20 : Persian Posted: 26 Sep 2020 12:34 AM PDT (Download) CBSE Class-10 Sample Paper And Marking Scheme 2019-20 : Persian
Sample Question paper
Persian
Class-X (2019-20) Time allowed: 3 hours
Maximum Marks: 80 Section A Read the following passage carefully and answer the questions from 1 to 3 in Persian 
 
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| (Download) CBSE Class-10 Sample Paper And Marking Scheme 2019-20 : Punjabi Posted: 26 Sep 2020 12:33 AM PDT (Download) CBSE Class-10 Sample Paper And Marking Scheme 2019-20 : Punjabi
Sample Question paper
Punjabi
Class-X (2019-20) Time allowed: 3 hours
Maximum Marks: 80 
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| (Download) CBSE Class-12 Sample Paper And Marking Scheme 2019-20 : Biology Posted: 26 Sep 2020 12:30 AM PDT (Download) CBSE Class-12 Sample Paper And Marking Scheme 2019-20 : Biology Time allowed: 3 hrs Maximum Marks: 70 General Instructions: 1 There are a total of 27 questions and five sections in the question paper All questions are compulsory
2 Section A contains question numbers 1 to 5, multiple choice questions of one mark each
Section B contains question numbers 6 to 12, short answer type I questions of two marks each
Section C contains question numbers 13 to 21, short answer type II questions of three marks each
Section D contains question number 22 to 24, case-based short answer type questions of three marks each
Section E contains question numbers 25 to 27, long answer type questions of five marks each
3 There is no overall choice in the question paper However, internal choices are provided in two questions of one mark, one question of two marks, two questions 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 Androgens are synthesized by:
(a) Sertoli Cells
(b) Leydig cells
(c) Seminal vesicles
(d) Bulbourethral gland
OR
A procedure that finds use in testing for genetic disorders, but is also misused for female foeticide is:
(a) Lactational amenorrhea
(b) Amniocentesis
(c) Artificial insemination
(d) Parturition 2 Which type of immune response is responsible for the rejection of tissues/organs in the patient’s body post transplantation?
(a) auto-immune response
(b) humoral immune response
(c) physiological immune response
(d) cell-mediated immune response
OR
Rheumatoid arthritis is caused when
(i) Lymphocytes become more active
(ii) Body attacks self cells
(iii) More antibodies are produced in the body
(iv) The ability to differentiate pathogens or foreign molecules from self-cells is lost
Choose the correct answer from the options given below:
(a) i and ii
(b) iii and iv
(c) i and iii
(d) ii and iv
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| (Download) CBSE Class-12 Sample Paper And Marking Scheme 2019-20 : Bio-Technology Posted: 26 Sep 2020 12:30 AM PDT (Download) CBSE Class-12 Sample Paper And Marking Scheme 2019-20 : Bio-Technology Sample Question paper
Bio-Technology-(045)
Class- XII Time allowed: 3 hours
Maximum Marks: 70 General Instructions: (i) The question paper comprises four Sections – A, B, C and D. Attempt all the Sections.
(ii) All questions are compulsory.
(iii) There is no overall choice. However, an internal choice has been provided in five questions of one mark, three questions of two marks, three questions of three marks and three questions of five marks. You have to attempt only one of the choices in such questions. Questions paper contains four sections A, B, C and D.
(iv) Question numbers 1 to 7 are very short answer questions carrying 1 mark each. Question numbers 8 to 12 are multiple choice questions carrying 1 mark each
(v) Question numbers 13 to 19 are short answer questions, carrying 2 marks each.
(vi) Question numbers 20 to 26 are also short answer questions, carrying 3 marks each.
(vii) Question numbers 27 to 30 are long answer questions, carrying 5 marks each.
(viii) Use of calculators is not permitted. However, you may use log tables, if necessary. SECTION A 1 Name any two scientists involved in designing the first recombinant DNA molecule.
2 Write any two properties which can be improved through protein engineering 1
3 Transgenic plants have been developed to survive in saline habitat. Which technique might have been used to develop such plants?
4 Which vector was used in the first cloning experiment involving mammalian cell?
OR
How does a modification enzyme protect its own DNA from digestion?
5 What was the strategy behind Human Genome Project? 1
6. An enriched medium containing salts, glucose, proteins and vitamins was made and a commercially available animal cell line was introduced. However, the cells began dying. What could be the reason behind it?
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