Class11 sample paper of biology

 CLASSXI 

SAMPLE PAPER OF BIOLOGY

SET-III

Q. NO.	QUESTION	MARKS
	Section A
1.	A plant shows thallus level of organization. It shows rhizoids and is haploid. It needs water to complete its life cycle because the male gametes are motile. Identify the group to which it belongs	1
2.	Name any two cell organelles which have its own DNA	1
3.	Name the stage of cell division which is best to study the morphology of chromosome.	1
4.	Observe the following animal pictures and identify the body symmetry: a)	1
5.	List the endocrine gland that is absent in males and the one absent in the female.	1
6.	virus is considered as a living organism and an obligate parasite when inside a host cell. But, virus is not classified along with bacteria or fungi. Give any two characters of virus that are similar to non-living objects?	1
7.	Explain why sunflower is not considered as a flower?	1
8.	What do you mean by monoadelphous.Give one example?                     OR Write the floral formula of the family -Solanaceae.	1
9.	Give one difference between ligament and tendon	1
10	Name the band of nerve fibres that join two cerebral hemispheres	1
	Directions: In the following questions, a statement of assertion is followed by a statement of reason. Mark the correct choice as:      a) If both assertion and reason are true and reason is the correct explanation of assertion.    b) If both assertion and reason are true but reason is not the correct explanation of the assertion.  c) If assertion is true but reason is false.  d) If both assertion and reason are false.
11.	Assertion: Nephrons are of two types cortical and juxtamedullary according to their relative position in the cortex.  Reason: Juxtamedullary nephrons have long loop of Henle while cortical nephrons have short loop of Henle.	1
12.	Assertion: Lysosomes are capable of digesting carbohydrate protein lipids and nucleic acids  Reason: Lysosomes are rich in hydrolytic enzyme like proteases and carbohydrases.	1
13.	Assertion: The colour of the leaf is due to the presence of four pigments- chlorophyll a, chlorophyll b, xanthophyll and carotenoids.  Reason: Chlorophyll b is the chief pigment associated with photosynthesis	1
14.	Assertion                :       Algae and fungi are grouped in thallophyta. Reason                   :       Algae and fungi show no differentiation in thallus.	1
	( Case Study)
15.	During vacation, Pradeep visited his village where his grandfather lives. Next day he went with his grandfather to visit their sugarcane fields, which was the main crop there. All the fields of sugarcane showed poor yield and dwarf varieties. They were not juicy as well. He suggested his grandfather and other farmers of the village to apply growth regulators in order to increase the yield and quality of sugarcane. (a) Which growth regulator Pradeep must have suggested them? (b) What impact it would have on quality and yield of sugarcane? (c) Name any two other applications of the hormone, useful in agriculture.	4 1+1+2
16.	A urine sample contained increased content of glucose and ketone bodies. Answer the questions below basis this observation. a) Name the hormone and gland associated with this condition. b) On which cells do these hormones act? c) Name the disease associated with it?	2+1+1 =4
	Section B
17.	Why is the wall of diatom indestructible? Give two function of diatomaceous earth	2
18.	With reference to biomolecules Which is the simplest amino acid? Name one of each acidic,basic,neutral amino acid. OR Name the stages of cell cycle at which the following events occur: Chromosomes move to spindle equator. Centromere splits and chromatids separate. Pairing between homologous chromosomes. Crossing over between homologous chromosomes.	2=1/2*4
19.	Q.12. (i) Name the type of placentation shown in the figure given below with one example each.                                                                     (b)	2
20.	Why the Deuteromycetes are known as fungi imperfectii? If a member of       It develop basidiospore, how will you classify it?	2
21.	a)Name the given figure b)Label ‘a’ & ‘b’ and mention the function of ‘a’ c) Which group does the figure belong to? OR Differentiate between polyp and medusa. (Any two differences).	½+1+1/2=2
22.	Write any four differences between cyclic and non-cyclic photophosphorylation.	2
23.	Which sugar is present in milk? How many monosaccharide units does it contain?
24.	Mycorrhiza and coralloid roots are found in which plants? What do these terms mean?	2
25.	Differentiate two heart sounds.	2
	Section C
26.	What is a centromere. How a position of centromere does forms the basis of     classification of chromosomes? Support your answer with the diagrams.	3
27.	Identify the phylum ( for invertebrates) or Class (for vertebrates) based on           salient features given below: Occurrence of polyp and medusa forms. Having ciliated comb plates. Presence of water vascular system. Possessing hairs. Having pneumatic bones. Presence of proboscis, a collar and a long trunk.	3
28.	Show a schematic plan showing step common in both aerobic and anaerobic respiration. Or Briefly describe six physiological effects of auxins.
29.	Describe the types of flowers, classified on the basis of relative positions of floral organs or parts on thalamus’ Explain with the help of diagram.	3
30.	On an educational trip to Uttaranchal, Ketki and her friends observe that many local people were having swollen necks, please help Ketki and her friends to find out the solutions to the following questions. (a)Which probable disease are these people suffering from? (b)How is it caused? (c)What effect does this condition have on pregnancy?	3
	Section D
31.	a) Explain the events in the cardiac cycle.  b) Which is the site where RBCs are formed? c) What in the heart of crocodiles is specific amongst reptilians?                          OR                                                           How is carbon dioxide and oxygen is transported in blood?	5
32.	Q..A List a hormone that a) Is in nature, gaseous b) Promotes cell divison c)Induces Apical dominance d) Is utilized to kill weeds(dicots) Explain Kreb cycle.                                      OR .Calvin cycle consists of three phases.What are they? Explain Calvin cycle. (b) A group of plants lack photorespiration. Answer the following questions based on these plants:      (i) Which cells in the plants have RuBisCO?      (ii) Does photorespiration occur in these plants?     (iii) In which cells the CO2 fixation initially occur?  ½*6 1+1/2+1/2	2+3
33.	Supply a specific term for each of the following- The period between two successive mitotic divisions. Process of cell division by which chromosome number is halved. Point at which two sister chromatids are held together. Phase in the cell cycle when protein and RNA are synthesised. B)Differentiate between Anaphase -1 of meiosis and Anaphase of Mitosis  OR a)Describe the fluid mosaic model of cell membrane and draw its well labelled diagram b)Electron microscopic studies of eukaryotic cells reveal the presence of a network of tiny tubular structures scattered in the cytoplasm that is called the endoplasmic reticulum (ER).    Name the two types of endoplasmic reticulum and what are their roles? 3	5 3+2

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