CBSE Sample Papers for Class 11  Biology Solved 2016 Set 7

Section – A

1.Name the hormones which increases and which decreases the rate of  photosynthesis.  [1]
2.Define a monograph. [1]
3.Give name to the association between roots of higher plants and fungi. [1]
4.Explain Zwitter ionic  form of amino acid.             [1]
5.Which type of joint is present between the carpal and metacarpal of thumb? [1]

Section – B

6.Explain the structure of a metacentric chromosome, with the help of a diaqram.[2]
7.Plasmolysis does not occur in animal cells but takes place in plant cells. Explain.[2]
8.Define phyllotaxy. Differentiate between opposite and whorled phyllotaxy. [2]
9.What are the events taking place in telophase stage of mitosis?   [2]
Name two hormones secreted by adrenal medulla and also write the non-hormonal functions they are responsible for.[2]

Section – C

10.Give reasons why?
(a)Chlorophyll-a occurs in different forms.
(b)Chloroplasts are generally located at outer margins of mesophyll cells.
11.How do neutral solutes move across the plasma membrane? Can the polar molecules also move across it in the same way? If not, then how are these transported across the membrane?   [3]
12.Usually the vascular bundles in roots are radial, i.e. xylem lies exterior to phloem. Is this condition particularly advantageous to roots?[3]
13.What is the differences between flora, fauna and vegetation? Eichhornia crassipes is called as an exotic species, while Rauwolfia serpentina is an endemic species in India. What do these terms exotic and endemic refer to?               [3]
14.What do you understand by rigor mortis?   [3]
15.Describe the phenomenon of heterospory in plants. Also give its two examples. [3]
16.Interphase, also known as resting stage of cell is considered to be the most active  phase of cell. Justify the statement.
Draw a labelled diagram of internal structure of cilia/flagella. Also, give differences  between cilia and flagella.[3]
17.(a)Which is the focussing part of eye? [1]
(b)What causes maximum refraction? [1]
(c)What is the function of lens of eye? [1]
18.(a)In which parts of body are smooth muscles present?
(b)List differences between cardiac muscles and straited muscles.
19.Observe the diagram and answer the following.
(a)Are these types of guard cells found in monocots or dicots?[1]
(b)Which of these shows a higher water content A or B ?[1]
(c)Which element plays an important role in the opening and closing of stomata?
CBSE Sample Papers for Class 11 Biology Solved 2016 Set 7-1
20.Distinguish between intracellular and extracellular digestion.[3]
21.Payal was walking along with her mother in a garden, during early morning. They observed many beautiful flowers of varied colours and shapes opening up. Payal got so attracted to these brightly coloured flowers and their smell that she went on to pluck them. Her mother stopped her from plucking by saying that they are very important for them. Out of curiosity Payal, asked her mom how there is, so much of variation in colours of flowers. Her mother being a biology teacher explained the reason to her.
(a)Why flowers are important to plants?
(b)What imparts colour to flowers?
(c)Name the other types of plastid found in plants.
(d)What values ;are shown by Payal? [4 x 1]

Section – D

22.(a) Illustrate the differences between a dicot and monocot seed,
(b) Draw a labelled diagram of a gram seed and a maize seed.
‘We still grow crops on land inspite of developing a successful technique of growing plants without soil.’ Explain.  [5]
23.Describe the famous Watson and Crick model of DNA?   [5]
Respiratory pathway is believed to be a catabolic pathway. However, nature of TCA cycle is amphibolic. Explain.     [5]

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