13850bio guess paper

8/13/2019 13850Bio Guess Paper

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Guess Paper

SCIENCE

Paper – 3 ( Biology )

( One hour and a half )

Answers to this Paper must be written on the paper provided separately.

You will not be allowed to write during the first 15 minutes.

This time is to be spent in reading the Question Paper.

The time given at the head of this paper is the time allowed for writing the answers

Attempt all questions from Section I and any four from Section II.

The intended marks for questions or parts of questions, are given in brackets [ ].

Mr. Rajendra Burriwar, M.Sc., B.Ed. turn over

SECTION I ( 40 Marks )

Attempt ALL Questions from this Section.

Question 1

a. Name the following : -

1. The process by which molecules distribute themselves evenly within the space they occupy.

2. Immunoglobulins produced by lymphocytes in response to antigenic substances.

3. The endocrine gland whose secretory activities are controlled by the sympathetic nervous system.

4. A vision condition in which close objects are seen clearly, but objects farther away appear blurred.

5. The principal toxin released by Union Carbide factory in Bhopal disaster . [5]

b. Given below in the box are a set of 12 biological terms which can be matched into 6 pairs. Of the six

pairs, one has been done for you as an example. Write out the remaining 5 matching pairs made by

you as ' 1 to 5 '.

Example : Kidney – Nephron [5]

Copper T, Neuron, Anhydrous cobalt chloride, Brain, Nephron, Chlorophyll,

Intrauterine device, Noise, Transpiration, Thylakoids, Decibel, Kidney.

http://en.wikipedia.org/wiki/Union_Carbide_India_Limited

http://en.wikipedia.org/wiki/Bhopal_disaster



http://en.wikipedia.org/wiki/Union_Carbide_India_Limited



Mr. Rajendra Burriwar, M.Sc., B.Ed [email protected]

2i.testseries

c. State whether the following statements are true or false. If false, write the correct statement by

changing the first word only.

1. Photosynthesis is the only biological process in which oxygen is produced.

2. Fibrin is a soluble protein present in blood plasma.

3. Rods are photoreceptor cells that are sensitive to bright light.

4. Iron is the mineral element responsible for the clotting of blood.

5. Angina pectoris is chest discomfort due to poor blood flow through the blood vessels in the heart. [5]

d. Given below are six sets, with four terms each. In each set, one term is odd and cannot be grouped into

the category to which the other three belong. Identify the odd one in each set and name the category

to which the remaining three belong. The first one has been done for you as an example.

Set Odd one Category

E.g. Fructose, Sucrose, Glucose, Calcium Calcium Carbohydrates

1. ADH, FSH, NADPH, ACTH, TSH

2. monocyte, leucoplast, eosinophil, basophil, lymphocyte

3. afferent arteriole, Henlee’s loop, efferent arteriole, vasa recta

4. simple goiter, dwarfism, acromegaly, cataract, cretinism

5. sneezing, coughing, typing, blinking, yawning

[5]e. Give the exact location and one function of each of the following structures: -

1. Sertoli cells

2. Aqueous humour

3. Lenticels

4. Organ of corti

5. Hydathodes [5]




3i.testseries

f. Carbon-based molecules are crucial for life on earth, as it is the main component of biological compounds.

Given below is a diagrammatic representation of the carbon cycle in nature. Study the same and answer

the questions that follow :-

1. What is carbon cycle ?

2. The carbon cycle comprises a sequence of events that play key role to making the

Earth capable of sustaining life; Name the events shown by the letters P, Q, R and S.

3. Carbon dioxide (CO2) is partly responsible for the greenhouse effect.

Name one most important human-contributed greenhouse gas of organic origin.

[5]

g. Explain the following terms : -

1. Guttation

2. Mutation

3. Antibiotic

4. Photolysis of water

5. Natality [5]

Carbon compounds

in carnivores

Carbon compounds

in herbivores

dead plants and animals

CO2 in atmospheric air

Q

P

RS

Carbon compounds

in green plants

http://en.wikipedia.org/wiki/Carbon_dioxide

http://en.wikipedia.org/wiki/Greenhouse_effect

http://en.wikipedia.org/wiki/Greenhouse_gas

http://en.wikipedia.org/wiki/Greenhouse_gas

http://en.wikipedia.org/wiki/Greenhouse_effect

http://en.wikipedia.org/wiki/Carbon_dioxide




4i.testseries

h. Given below are five groups of terms. In each group, arrange and rewrite the terms in the correct

order so as to be in a logical sequence. An example has been done for you : -

E.g. : Penis, testis, sperm duct, sperm, semen.

Answer : testis sperm sperm duct semen penis.

1. ear ossicles, oval window, tympanum, auditory canal, cochlea.

2. effector, sensory neuron, receptor, motor neuron, relay neuron.

3. arterioles, carbon dioxide, capillaries, oxygen, tissues, venules.

4. endodermis, root hair, xylem, soil water, cortical cells.

5. aorta, hepatic vein, hepatic portal vein, gut, liver. [5]

SECTION II ( 40 Marks )

Attempt any FOUR Questions from this Section.

Question 2

a. Given diagram illustrates a family chart of two parents and their children. Study it carefully and

answer the questions that follow : -

1. Which character of the parents is shown in the pedigree chart ?

2. Which recessive trait in shown in one of the children ?

3. From where does the recessive gene come from in the child ?

4. What do you conclude from the pedigree chart ?

5. Mention the phenotype ratio shown in the diagram. [5]




5i.testseries

b. Define the following terms : -

1. Hypotonic solution

2. Non-biodegradable

3. Antitoxin

4. Fertilization

5. Diapedesis [5]

Question 3

a. The diagram given below shows the internal structure of the lamina and midrib of a leaf.

Study the same and answer the questions that follow : -

1. Is the section of leaf shown below is isobilateral or dorsiventral leaf ?

Give a reason to support your answer.

2. Name the parts i, ii, iii and iv indicated by the guidelines.

3. What is the function of the parts labeled ii and iii ?

4. Which part shown in the diagram but not labeled help in minimizing transpiration. [5]

iii

i

ii

iv




6i.testseries

b. Give reasons for the following : - [2]

1. Injury to the medulla oblongata results in death.

2. On maturity, nucleus and other cell organelles disappears in RBC’s.

c. Draw a neat and well labeled diagram of generalized nerve cell. (3)

Question 4

a. Given below is a schematic representation of the circulatory system in man. Study the same and

answer the questions that follow : -

lungs iii

1. Label the parts i to ii indicated in the diagram.

2. Give one difference between the parts i and ii based on : -

a) their structure

b)

the nature of blood flowing through them.

3. What is the specific name of the type of blood circulation that takes place between the heart

and the lungs ?

4. Name the valve found at the beginning of the part labeled iii. [5]

b. Arrange in sequential order : [2]

1. ovulation gestation, oogenesis, parturition, implantation.

2. urogenital duct, seminiferous tubule, epididymis, ejaculatory duct, vas deferens, urethra.

i L. A

ii

iv




7i.testseries

c. Explain briefly : -

1. On entering a poorly lit room, one feels blinded for a short while.

2. Glucose is normally not found in urine.

3. Xerophytes have their leaves modified to spines or reduced in size. [3]

Question 5

a. Give the appropriate terms for the following : -

1. a small gap separating neurons across which Information from one neuron flows to

another neuron.

2. the region of distinct vision in the human eye.

3. a chemical released by a cell or a gland in one part of the body that sends out messages

that affect cells in other parts of the organism.

4. the rate of the arterial pressure usually observed at the wrist and stated in beats per minute.

5. The process by which neutrophils engulf pathogens. . [5]

b. The diagram given below is the external view of the human brain. Study the same and answer the

questions that follow : -

i

ii

iii




8i.testseries

1. Name the parts labeled i, ii and iii.

2. State the main functions of the parts labeled i and ii.

3. How are the brain cells arranged in the part labeled ' i ' ?

4. What is the structural and functional unit of the nervous system ?

5. Name the fluid that surrounds the brain. State its function. [5]

Question 6

a. Given below is a schematic diagram of a portion of DNA. Study the diagram and answer

the following questions.

1. Label the parts numbered i, ii and iii.

2. How many strands are shown in the diagram ?

3. How many nucleotides have been shown in each strand ?

4. What is a nucleoside ?

5. During which phase of cell cycle does DNA molecule duplicates ? [5]

iiii ii




9i.testseries

b. Differentiate between the following pairs on the basis of what is given in brackets : -

1. Choroid and Sclerotic layers of the eye ( function )

2. Lymphocytes and Neutrophils ( structure of the nucleus )

3. Dynamic Balance and Static Balance ( definition )

4. Beginning of the ventricular systole and the ventricular diastole ( type of heart sound )

5. Plasma and Serum ( composition ) [5]

Question 7

a. Given below is the diagram of a part of the nephron of the Kidney. Study the same and answer the

questions that follow : -

1. Name the parts labeled i, ii and iii.

2. What is the collective term used for ii and iii ?

3. Why is the right kidney at a slightly lower level than the left ?

4. Explain the term homeostasis. What is the role of the kidney in this ? [5]

i

ii

iii




10i.testseries

b. The diagram given below represents a stage during mitotic cell division in an animal cell.

Study the diagram and answer the following questions : -

1. Identify the stage.

Give reason to support your answer.

2. Name the parts labeled i, ii, iii, and iv.

3. What is the chromosome number shown in the cell ?

4. Give significance for this type of cell division.

5. Draw a neat, labeled diagram of the cell as it would appear in the next stage and

name the stage. [5]

i

ii

iii

iv

13850bio guess paper

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