CBSE Class 12 Biology Compartment Question Paper Solved 2020 Set B
SECTION A 1. The role of FSH in the process of spermatogenesis in humans is to (A) stimulate the secretion of certain factors from Sertoli cells. (B) inhibit the secretion of testosterone from the interstitial cells. (C) stimulate the action of testosterone on Sertoli…
CBSE Class 12 Biology Compartment Question Paper Solved 2020 Set A
At which trophic level or levels does the species VIII function ? (A) 2nd and 3rd consumer (B) 1st consumer (C) Producer (D) 3rd and 4th consumer 2. Some cyanobacteria in aquatic and terrestrial environment that enrich the soil by fixing atmospheric nitrogen are (…
CBSE Class 12 Biology Boards 2020 Question Paper Solved Set E
SECTION – A 1. Which one of the following part of the plant when put into the soil is likely to produce new offspring ? (a) Part of an internode (b) A stem cutting with a node (c) Part of a primary root (d) A flower 2. In a bacterium when RNA-polymerase binds to the…
CBSE Class 12 Biology Boards 2020 Question Paper Solved Set D
SECTION – A 1. Which one of the following is not found in a female gametophyte of an angiosperm ? (a) Germ pore (b) Synergids (c) Filiform apparatus (d) Central cell 2. The autosomal disorder/disease in humans is (a) Colour blindness (b) Thalassemia (c)…
CBSE Class 12 Biology Boards 2020 Question Paper Solved Set C
SECTION A Note : Choose the correct option from the choices given in each of the following questions : 1. Introduction of an alien DNA into a plant host cell is achieved by making them (A) Competent with bivalent ions (B) Using microinjections (C) Using gene gun (D)…
CBSE Class 12 Biology Boards 2020 Question Paper Solved Set B
SECTION A Note : Choose the correct option from the choices given in each of the following questions. 1. Cleistogamous flowers are self-pollinated because (A) they are bisexual flowers which do not open at all. (B) they are bisexual and open flowers. (C) they are…
CBSE Class 12 Biology Boards 2020 Question Paper Solved Set A
SECTION A 1. Meselson and Stahl carried out centrifugation in CsCl2 density gradient to separate : (A) DNA from RNA (B) DNA from protein (C) The normal DNA from 15N-DNA (D) DNA from tRNA 2. Self-pollination is fully ensured if 1 (A) the flower is bisexual. (B) the style is…
CBSE Class 12 Biology Question Paper 2020 Set B
CBSE Class 12 Biology Question Paper 2020 Set B. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in…
CBSE Class 12 Biology Question Paper 2020 Set A
CBSE Class 12 Biology Question Paper 2020 Set A. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in…
CBSE Class 12 Biology Question Paper Solved 2019 Set M
CBSE Class 12 Biology Question Paper Solved 2019 Set M. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in…
CBSE Class 12 Biology Question Paper Solved 2019 Set J
CBSE Class 12 Biology Question Paper Solved 2019 Set J. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in…
CBSE Class 12 Biology Question Paper Solved 2019 Set G
CBSE Class 12 Biology Question Paper Solved 2019 Set G. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in…
CBSE Class 12 Biology Question Paper Solved 2019 Set C
CBSE Class 12 Biology Question Paper Solved 2019 Set C. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in…
CBSE Class 12 Biology Question Paper Solved 2019 Set B
CBSE Class 12 Biology Question Paper Solved 2019 Set B. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in…
CBSE Class 12 Biology Question Paper 2019 Set N
CBSE Class 12 Biology Question Paper 2019 Set N. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in…