199234645Biology Guess Paper

( Science - Paper - 3 ) Biology

( One hour and a half )

Answers to this paper must be written on the separate paper.

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

The question paper is divided into two Sections.

Attempt all questions from Section A and any four from Section B.

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

This Paper Consists of 11 Printed Pages and 01 blank Page

FPT / 12 - C turn over

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

Section A ( 40 marks )

Compulsory : Answer all parts of this Question

Question – 1

A. Complete the following pairs of terms taking help from the examples given.

Write down the complete pair and underline your answer : - (05)

E.g. Mitochondria : Respiration : : Chloroplast : Photosynthesis

1. Transpiration : Stomata : : Guttation : ……………………

2. Diabetes mellitus : Insulin : : Diabetes insipidus : ……………………

3. Birth rate : Natality : : Death rate : ……………………

4. Ovaries : Ovum : : Testes : ……………………

5. Salk’s vaccine : Polio : : BCG vaccine : ………………………

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

2 [email protected]

B. Name the following : - (05)

1. Endocrine cells present in the human male reproductive organs.

2. Part of the brain that controls the activities of the visceral organs.

3. Type of cell division which brings about vegetative growth in plants.

4. Stacks of thylakoids that greatly increases the efficiency of light reaction.

5. Single unit of nucleic acid that composed of phosphate ion, pentose sugar

and nitrogen base.

C. Given below in the box are a set of 16 biological terms. Of these 12 can be

paired into 6 matching pairs. Of the six pairs, one has been done for you as

an example. Write the remaining 5 matching pairs : - (05)

Example : - Stomata Transpiration

D. State whether the following statements are true or false. If false write the correct

statement by changing the word / s in bold face only : - (05)

1. Two normal parents can produce a son with haemophilia.

2. Antiseptics are chemical substances produced by microorganisms.

3. Cells that have lost their water content are said to be flaccid.

4. Cerebrum is a part of human brain, which co - ordinates the activities of

skeletal muscles.

5. Gonadotropins stimulate ovaries and help to secrete oestrogens.

Uterus, Corpus luteum, Oestrogen, Stomata, Thylakoid,

Transpiration, Chromosome, Scrotum, Cretinism, Haploid, Testes,

Thyroxin, Progesterone, Chlorophyll, Hypothyroidism, Endometrium.

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

3 [email protected]

E. Match the following : - (05)

Column – A Column – B

1. Recessive

2. Co - dominance

3. Dominant

4. Homologous

5. Genome

a. Pair of chromosomes that carries similar alleles of a

particular character.

b. A set of haploid chromosomes present in human

gametes.

c. An allele which has same effect on the phenotype of

an organism in homozygous as well as in

heterozygous condition.

d. Existence of two alleles for a character where neither

is dominant over the other.

e. An allele that is always suppressed in heterozygous

condition.

F. Complete the following statements by filling in the blanks : - (05)

1. The space between the cornea and lens is filled with …………………….…………

2. When cell division fails to work with complete accuracy, it results in ………….…..

3. The seat of memory and intelligence in the human brain is …………….…………..

4. …………………….…….. is the outermost of the two extra embryonic membranes that

surrounds the foetus.

5. ………………………………… are located in inner ear and help in maintenance of body

position in response to movement.

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

4 [email protected]

G. Give the technical term for each the following statements : - (05)

1. Condition in which the near vision is clear and distant vision is blurred.

2. Filtration of blood in malpighian body, under tremendous hydrostatic pressure.

3. Squeezing of white blood corpuscles through the walls of the blood capillaries.

4. The process by which vas deferens of a human male is surgically disconnected.

5. Splitting of water molecules into H + and OH – ions with the help of radiant energy.

H. Differentiate between the following : - (05)

1. Antiseptics and Disinfectants

2. Turgidity and Flaccidity

3. Geometric Progression and Arithmetic Progression

4. Leukocytes and Erythrocytes

5. Afferent arteriole and Efferent arteriole

Section – II [ Marks – 40 ]

[ Attempt any four questions from this Section ]

Question – 2

A. Name the blood vessel which carry blood from : - (04)

1. kidneys to posterior venacava

2. liver to posterior venacava

3. right ventricle to lungs

4. heart muscles to right auricle

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

5 [email protected]

B. The diagram given below shows a developing foetus in a human female.

Study the diagram and answer the following questions : - (06)

1. Mention one important function of part labelled umbilical cord.

2. Mention one important function of part labelled placenta.

3. Which part of the human female reproductive organs form placenta ?

4. Which part shown in the diagram is endocrine in function ?

5. Name two foetal membranes surrounding the foetus.

6. Give one term for the period of developmental events from conception

till the birth of youngone.

Question – 3

A. Select one suitable word from the three alternatives given to fill in the blanks

in the following sentences : - (05)

1. According to recent theory stomata opens due to …………………………………

( high sugar concentration / influx of K + ions in the guard cells / presence of CO2 ).

2. In human species ………………………… ( allosomes / centrosomes / autosomes )

determine the sex of an individual.

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

6 [email protected]

3. Colour-blindness is caused due to ……………………….. ( recessive / dominant /

co-dominant ) allele and is therefore masked in heterozygous condition.

4. The role of bones in the middle ear is to …………………………….. ( amplify the

stimulus / amplify the response / stimulate the tympanum ).

5. The process of maintaining ionic balance in the body is called ………………………

( diffusion / excretion / osmoregulation ).

B. Given below is an experimental set - up of a living cell and the result of the

experiment : - (05)

1. Name the parts marked A, B, C and D.

2. What is the technical term for the condition of cell in fig B.

3. Name the solution in which the cell in fig A was placed.

4. Under what conditions in the soil will the root hair cell resemble cell in fig B.

5. Give the significance of the phenomenon studied in the experiment.

Question – 4

A. Draw the microscopic view of Malpighian body of a nephron and label the any four

parts of the structure. (04)

Fig A - ( before )

Fig B - ( after )

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

7 [email protected]

B. The diagram given below shows a section of the human eye. Study the diagram

and answer the following questions : - (06)

1. Label the parts marked i to iv and give

one function of each part labeled.

2. What is accommodation ? Explain the

changes that take place in eye to help in

accommodation.

3. Suggest why it is an advantage to have

two eyes instead of one.

4. State the nature of image formed on retina.

5. Name one eye pigment synthesized from

vitamin A

6. In nocturnal animals like bat and owl,

photoreceptors have mainly

…………………….. ( rods / cones )

Question – 5

A. Given below is a set of terms. In each case rewrite the terms in the correct

order so as to be in logical sequence : - (05)

1. sperm duct seminiferous tubule urethra ejaculatory duct epididymis

2. pupil eye lens cornea optic nerve vitreous humour fovea

3. tympanum auditory canal cochlea ear ossicles auditory nerve

4. reduction of CO2 radiant energy formation of glucose splitting of water

into H + and OH – ions production of oxygen

5. cortical cells midribs soil water endodermis root hair xylem.

iii

ii

i

iv

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

8 [email protected]

B. The main external factors that control the rate of photosynthesis are light intensity,

carbon dioxide concentration and temperature. Study the given graphs and answer

the questions that follow : - (05)

Graph – A Graph – B

1. State the relationship between CO2 concentration and light intensity from graph – A.

2. Graph – B shows there is a decrease in rate of photosynthesis above 40oC.

Give reason.

3. What happens when the light intensity and CO2 concentration remain constant ?

4. The optimal temperature at which photosynthesis takes place is 20 to 30°C.

a. If the temperature is high, plant enzymes become ………………………………

(denatured / active) decreasing the rate of photosynthesis.

b. If the temperature is low, plant enzymes become ……………………………….

(denatured / inactive) decreasing the rate of photosynthesis; therefore,

photosynthesis is found to be highly sensitive to temperature.

5. If light intensity is constant, what changes do you analyze from the graph - B

for rise of every 10 o C till the optimum temperature reaches ?

Rat

e o

f p

ho

tosy

nth

esis

Light intensity / CO2 concentration

Low Light intensity / CO2

concentration

High Light intensity / CO2

concentration

Rat

e o

f p

ho

tosy

nth

esis

4

10oC 20oC 30oC 40oC Temperature

2

1

6

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

9 [email protected]

Question – 6

A. Given below are four diagrams which indicate four stages of cell division

in a living cell : - (04)

1. Name the type of cell division shown in the diagram.

2. What is the significance of this type of cell division ?

3. Where does the above mentioned cell division take place in human males ?

4. What type of daughter cells are formed in the above cell division ?

5. Arrange the stages A, B, C and D in a sequential order and mention name of each

stage.

B. Given below is a schematic representation showing inheritance of tongue – rolling

in two families. A person’s ability to roll the tongue is caused by a dominant allele.

Using R to represent the dominant allele and r to represent the recessive allele,

answer the following questions : - (06)

A B

E F

C

H

D

G J

K

A B C D

male

female

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

10 [email protected]

1. What are the genotype of individuals A , B, C and D ?

2. What are the genotype of individuals E, F , G and K ?

3. What are the chances that the next child born to F and G will be ?

4. What is the phenotype of the solid (shaded lines ) symbols ?

Question – 7

A. The diagram given below shows the internal structure of the spinal cord,

depicting a simple reflex. Study the same and answer the

following questions : - (06)

1. Name the parts labelled i to viii in the diagram.

2. What is the term given to the point of contact between two nerve cells ?

3. State the function being depicted in the diagram.

4. Name the substance which helps in chemical transmission of impulse

from one neuron to another.

5. How does the arrangement of cells in the spinal cord differ from that in the

brain ?

6. What is the technical term given to the pathway represented in the diagram.

i

ii

iii

v vi

iv

vii viii

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

11 [email protected]

B. The diagram given below shows an organ systems and a gland associated with it.

Study the diagram and answer the following questions : - (04)

1. Mention three organ systems shown partly in the diagram.

2. Name the gland associated with the structure.

3. Name one hormone each secreted by two different regions of this gland.

4. Name one disorder due to hypo secretion of hormones secreted from

cortex region of this gland.

5. Name one disorder due to hyper secretion of hormones secreted from

cortex region of this gland.

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

12 [email protected]