objective-biology- part -B,Class -X

 PART-B

Instructions:

1.         Answer all the questions.

2. Each question carries ½ marks.

 3. For questions 1 to 10, the answers are given under capital letter A, B, C & D the capital letter that indicates the correct answer is to be written in the  brackets provided

4. Correction & over writing will be discredited.

 

I.          Pick up the correct answer and fill in the brackets with the capital letter of the correct answer chosen.

1. Lymph is a part of

A] Digestive system      B] Excretory system              C] Nervous system      D] Transport system              (        )

2. Vitamin K is soluble in

A] Alcohol                         B] Water                                       C] Fat                                 D] Acid                                                     (                 )

3. In which precise area does meiosis take place

A] Stamen                                B] Anther                                C] Pollen mother cell       D] Pollen grain             (                 )

4. Operculum occurs in

A] Bony fishes                      B] Frog                                          C] Cockroach                         D] Cartilagenous fishes      (                 )

5. Smallest of all white blood corpuscles is

A] Erythrocytes                       B] Lymphocytes          C] Monocytes                         D] Eosinophils             (                 )

6. Conversion of Glucose into pyruvic acid yields a net gain of

A] 2 molecules of ATP B] 36 molecules of ATP C] 4 molecules of ATP D] 38 molecules of ATP (       )

7. The disease caused due to the contamination of food in cattle in British is

A] Mad-Cow          B] Cholera              C] Small pox                        D] Diarrhoea                           (        )

8. The length of trachea in man is

A] 11 cm             B] 15 cm                   C] 7 cm                                 D] 3 cm                                                (               )

9. Which cells are destroyed in AIDS

A] Monocytes     B] Lymphocytes     C] Neutrophils                       D] RBC                                               (        )

10. The important anion of the body is

A] Potassium         B] Bromide              C] Chloride                           D] Calcium                                           (                 )

 

II.  Fill in the Blanks

11. Number of spinal nerves in man is _________ pairs.
12. Buds in Bryophyllum are known as ________________ buds.
13. A German called __________________ was the originator of first aid.
14. The human brain has _____________ sense to appreciate poetry.
15. The instrument used for determining BMR is called as _______________.
16. Cell division in vascular cambium is promoted by _________________.
17. The example of active transport in living organisms is ______________.
18. ______________________ won noble prize for his work on Photosynthesis.
19. During the implantation, embryo gets attached to the wall of ______________.
20. ______________ prevents the blood from clotting in the blood vessels.

 

III.              Match the following each questions carries ½ marks.

21. Deficiency of iodine                                   (        )                          A. Cockroach

22. Alary muscles                                (          )                   B. Gills

23. Erythrocytes                                  (         )                   C. Simple goiter

24. Mumps                                          (         )                    D. White blood cells

25. Tadpole larva of frog                     (        )                    E. Red blood cells.

                                                                                           F. Myxovirus parotiditis

                                                                                                                                                                        G. Paramyxovirus

 

26. Xerophthalmia                             (          )                     A. Conjugation.

27. Blood                                           (          )                     B. Nissil granules

28. Vasopressin                                 (          )                     C. Deficiency of 'A' Vitamin

29. Cyton                                           (         )                      D. Hormone

30. Paramoecium                               (         )                      E. Fluid tissue

                                                                                            F. Enzyme

                                                                                            G. Sperm

Bio pre-final,Class -X

GENERAL SCIENCE PAPER-II  

PARTS A and B

            Time: 2 ½ hours                                                                                                              Maximum Marks: 50

            Class:X

            Instructions:

1.                  Answer the questions under Part A on a separate answer book.

2.                  Write the answers to the questions under Part B on the question paper itself.

                                                            Part-A

Time: 2 Hours                                                                           Marks: 35

                                                SECTION-I

Note:

1.      Answer ANY FIVE questions, choosing at least TWO from each Group       A&B.

2.         Each question carries TWO marks.

                                                GROUP-A

1.                  Define photosynthesis and write the chemical equation?

2.                    What is the role of the Riboflavin in the body?

3.                    Describe human sperm?

4.                    Write a short note on glossitis?

                                                GROUP-B

5.                    What is serum?

6.                    What is mal nutrition? What are the defects seen in children due to malnutrition?

7.                    Mention the symptoms of fracture?

8.                    What is the role of Gibberellins in plant growth & development?

                                                SECTION-II

Note:

1.         Answer ANY FOUR questions from the following.

2.         Each question carries ONE (1) mark.

 

9.                    What is apical dominance?

10.                 What is totipotency?

11.                 What is meant by agglutination of blood?

12.                 Which is called as graveyard of red blood cells & why?

13.                 What is tetany?

14.                 What is an explant?

                                                SECTION-III

Note:

1.      Answer ANY FOUR questions, choosing TWO from each GROUP

2.       Each question carries FOUR (4) marks.

                                                                GROUP-A

15.                 Describe the structure of Mitochondria with the help of a neat diagram?

16.                 Write an account on adrenal gland?

17.              What are the differences between combustion and respiration?

18.              What are Agranulocytes? Write an account on them.

                                   

                                                GROUP-B

19.              What are the differences between asexual reproduction & sexual reproduction?

20.              What is hypertension? Describe.

21.              What is meant by Vitamin? How many types of Vitamins are there?

22.              What are the effects of Kwashiorkor on children?

 

                                                SECTION-IV

Note:

1.       Answer ANY ONE question.

2.       The question carries FIVE marks.

 

23.              Draw the diagram showing the internal structure of heart?

24.              Draw the diagram of longitudinal section of Datura flower and label its parts.

                                               

 

                                                           

                       

 

 

 

physics imp questions of 6th unit

 

Name: Important                         Class: X                                        Subject: Physics

 

SOUND

                                                           

 

I choose the correct answer

 

1.  Velocity of sound in air is                                                                                          (    )

(a) V = Öp/Pv               (b) V = ÖpP/v              (c) V = ÖvP/p               (d) V = ÖP/p

2. In a resonating air column experiment with a closed-end tube, first resonance occurs when the length of the air column is 10 cm.   Second resonance occurs at                 (    )

(a) 5 cm                       (b) 20 cm                     (c)   30 cm                    (d)  40 cm

3. A medium transmits a sound wave through it by virtue of its                           (     )

(a) Elasticity                  (b) Inertia                     (c) Density         (d) Elasticity and inertia

4. The wavelength of a wave is the                                                                                (    )

(a) Distance between two vibrating particles with a phase difference of p.

(b) Distance between a crest and a consecutive trough

(c) Distance between any two particles vibrating in same phase

(d) Distance between any two particles vibrating out of phase by p/2

5. Distance between a node and the next anti node in a stationary wave is 10cm.  Then the wavelength is                                                                                                                        (     )

(a) 5cm                        (b) 40cm                      (c) 20cm                       (d) 10cm

6. In a stationary wave, the point at which the displacement is maximum is called            (     )

(a) Node                      (b) Anti node                (c) Crest                        (d) Trough

7. Always an anti node is formed at the                                                                         (    )

(a) Closed end  (b) Open end    (c) Either at closed or open end             (d) None         

8. Periodic vibrations of decreasing amplitude are called                                                (    )

(a) Forced vibrations      (b) Damped vibrations      (c) Resonance         (d) Natural vibrations

9. Velocity of sound is minimum in                                                                                 (    )

(a) Steel                       (b) Vacuum                  (c) Water                      (d) Air

10. The Velocity of sound in air can be determined experimentally using the formula (    )

(a) V = u l                   (b) V = Ö lP/p              (c) V = C_p/C_v                     (d) V = 2 u(I₂ – I₁)

 

II Fill in the blanks

 

1. Every system has its own frequency called ___________________

2. The vibrations that take place under the influence of an external periodic force are called __________________

3. When two waves of equal frequency and amplitude travel in opposite direction _________________ are formed.

4. A wave undergoes a phase change of __________________ on reflection.

 

5. Distance between two successive nodes or antinodes is ________________

6. Distance between a node and the next anti node is _____________

7. Particles undergo minimum displacement at _________________ in a stationary wave.

8. The velocity (V) of sound wave of frequency ( u) and wavelength ( l) is given by __________________

9. If the displacement of particles of medium is at right angles to the direction of propagation of wave, then the wave is said to be a________________ wave.

10. If the displacement of particles of a medium is parallel to the direction of propagation of the wave then the wave is said to be a ____________________ wave.

 

III 1 Mark questions

 

1. What is a damped vibration?

A. Periodic vibrations of decreasing amplitude are called damped vibrations.

2. Define resonance?

A. If one of the two bodies of the same natural frequency is set into vibration, the other body also vibrations are called resonance.

 

IV 2 Marks questions

 

1. What is a resonating air-column?

2. Explain the terms 'natural' and 'forced vibrations'

3. Describe an experiment to demonstrate resonance and forced vibrations

 

V 4 Mark questions

 

1. Describe a few incidents of resonance phenomenon observed in your day-to-day life.

2. Distinguish between progressive and stationary waves.

3.Describe an expt to determine velocity of sound in air using resonating air columns?