Class 10

1.Which of the following events in the mouth cavity will be affected if salivary amylase is lacking in the saliva?
(a) Starch breaking down into sugars.
(b) Proteins breaking down into amino acids.
(c) Absorption of vitamins.
(d) Fats breaking down into fatty acids and glycerol.
2.Which among the following is a unicellular organism that reproduces by budding:

(a) Hydra

(b) Planaria

(c) Yeast

(d) Spirogyra
3.Which among the following does not reproduce by spore formation:
(a) Penicillium fungus

(b) Yeast fungus

(c) Mucor fungus

(d) Rhizopus fungus

4. The rapid spreading of bread mould on slices of bread are due to:
(i) Presence of large number of spores in air

(ii) Presence of large number of thread-like branched hyphae

(iii) Presence of moisture and nutrients

(iv) Formation of round shaped sporangia


(a) (i) and (iii)

(b) (ii) and (iv)

(c) (i) and (ii)

(d) (iii) and (iv)

5. The asexual reproduction in the Spirogyra involves:
(a) Breaking up of filaments into smaller bits

(b) Division of a cell into many cells

(c) Division of a cell into two cells

(d) Formation of a large number of buds

6. Reason for the greater similarities among the offsprings produced by asexual reproduction, is:
(i) Asexual reproduction involves only one parent

(ii) Asexual reproduction involves two parents

(iii) Asexual reproduction involves gametes

(iv) Asexual reproduction does not involve gametes

(a) (i) and (ii)

(b) (i) and (iii)

(c) (ii) and (iv)

(d) (i) and (iv)


7. The process of the division of cell into several cells during reproduction in Plasmodium is termed as:
(a) Fragmentation

(b) Budding

(c) Multiple fission

(d) Binary fission

8. The number of chromosomes in parents and offsprings of a particular species remains constant due to:

(a) Doubling of chromosomes after zygote formation

(b) Halving of chromosomes during gamete formation

(c) Doubling of chromosomes after gamete formation

(d) Halving of chromosomes after gamete formation

9. A Planaria worm is cut horizontally in the middle into two halves P and Q such that the part P contains the whole head of the worm. Another Planaria worm is cut vertically into two halves R and S in such a way that both the cut pieces R and S contain half head each. Which of the cut pieces of the two Planaria worms could regenerate to form the complete respective worms?
(a) Only P

(b) Only R and S

(c) P, Rand S

(d) P, Q, R and S

10. The number of chromosomes in both parents and offsprings of a particular species remains constant because:
(a) Chromosomes get doubled after zygote formation
(b) Chromosomes get doubled after gamete formation

(c) Chromosomes get halved during gamete formation

(d) Chromosomes get halved after gamete formation

11. An organism capable of reproducing by two asexual reproduction methods one similar to the reproduction in yeast and the other similar to the reproduction in Planaria is:
(a) Spirogyra

(b) Hydra

(c) Bryophyllum

(d) Paramecium


12. Among the following select the statements that are true regarding the sexual reproduction in flowering plants?
(i) Fertilisation is a compulsory event

(ii) It always results in the formation of zygote

(iii) Offsprings formed are clones

(iv) It requires two types of gametes

(a) (i) nad (iv)

(b) (i), (ii) and (iii)

(c) (i), (ii) and (iv)

(d) (ii), (iii) and (iv)

13. Which among the following are not the functions of testes at puberty?
(i) Formation of germ cells

(ii) Secretion of testosterone

(iii) Development of placenta

(iv) Secretion of estrogen

(a) (i) and (ii)

(b) (i) and (iii)

(c) (ii) and (iv)

(d) (iii) and (iv)


14. Which out of the following processes does not lead to the formation of clones:
(a) Fertilisation

(b) Fission

(c) Tissue culture

(d) Fragmentation


15. The ratio of number of chromosomes in a human zygote and a human sperm is:
(a) 2 : 1

(b) 3 : 1

(c) 1 : 2

(d) 1 : 3
16. The two oviducts in a human female unite into an elastic bag like structure known as
a. Vagina
b. Uterus
c. Fallopian tube
d. Cervix
17. Which of the following disease is transmitted sexually?
a. Kala azar
b. Jaundice
c. Cholera
d. Syphilis
18.Which of the following is a contraceptive?
a. Copper t
b. Condom
c. Diaphragm
d. All of these
19. When a animal is cut into pieces and each piece grows into a complex organism. What is the process?
a. Budding
b. Fragmentation
c. Spore formation
d. Regeneration
20. Which is the portion on which grafting is done it provides the roots? a. Stock
b. Scion
c. Both a and b
d. None of these
21. Where does fertilization occur in human females?
a. Uterus
b. Cervix
c. Oviduct
d. None of these
22. Growing foetus derive nutrition from mother's blood through
a. Uterus
b. Fallopian tube
c. placenta
d. cervix
23. What is the puberty age in human males?
a. 8-10
b. 10-12
c. 12-14
d. 14-16
24. Fruits are formed from
a. Stamen
b. Stigma
c. Ovary
d. Ovule
25. IUCD is for
a. Vegetative propagation
b. Contraception
c. Increasing fertility
d. Avoiding miscarriage

26. During favourable conditions, Amoeba reproduces by
(a) multiple fission
(b) binary fission
(c) budding
(d) fragmentation

27. . A feature of reproduction that is common to Amoeba, Yeast and Spirogyra is that
(a) they reproduce asexually
(b) they are all unicellular
(c) they reproduce only sexually
(d) they are all multicellular

28. The ability of a cell to divide into several cells during reproduction in Plasmodium is called
(a) budding
(b) multiple fission
(c) binary fission
(d) reduction division

29. Bryophyllum can be propagated vegetatively by the
(a) stem
(b) leaf
(c) root
(d) flower

30. Vegetative propagation refers to formation of new plants from
(a) stem, flowers and fruits
(b) stem, leaves and flowers
(c) stem, roots and flowers
(d) stem, roots and leaves

31. In a potato, vegetative propagation takes place by:
(a) root
(b) leaf
(c) stem tuber
(d) grafting
Answer
32. Vegetatively propagated plants
(a) do not bear roots
(b) do not bear buds
(c) are genetically similar
(d) are genetically dissimilar

33. Spirogyra reproduce by
(a) budding
(b) fragmentation
(c) regeneration
(d) fission

34. In Rhizopus, tubular thread like structures bearing sporangia at their tips are called
(a) filaments
(b) hyphae
(c) rhizoids
(d) roots

35. Plants like banana, rose, jasmine, orange have lost the capacity to produce
(a) seeds
(b) buds
(c) flower
(d) roots

36. The flower of the Hibiscus plant is
(a) bisexual
(b) unisexual
(c) neuter
(d) very small

37. The part of the flower which is present in the centre of the flower is
(a) Sepals
(b) Petals
(c) Carpels
(d) Stamens

38. The seed that contains the future plant is called the
(a) cotyledons
(b) seed coat
(c) germ cells
(d) embryo

39. The period of pregnancy is called
(a) gestation period
(b) incubation period
(c) ovulation
(d) menstruation period

40. The process of release of eggs from the ovary is called
(a) menstruation
(b) reproduction
(c) insemination
(d) ovulation

41. The period during adolescence when the reproductive tissues begin to mature is called
(a) ovyfetion
(b) puberty
(c) germination
(d) propagation

42. In human beings, the fertilization occurs in the
(a) uterus
(b) ovaries
(c) fallopian tubes
(d) vagina

43. Along the path of the vas-deferens the secretions of which gland provide nutrition to the sperms?
(a) Prostate glands
(b) Seminal vesicles
(c) Scrotum
(d) Urinary bladder

44. The embryo in humans gets nutrition from the mother’s blood with the help of a special tissue called
(a) Placenta
(b) Villi
(c) Uterus
(d) Womb

45. Which among the following diseases is not sexually transmitted?
(a) Syphyllis
(b) Hepatitis
(c) HIV-AIDS
(d) Gonorrhea

46. Which of the following method of contraception protects from acquiring sexually trans¬mitted diseases?
(a) Surgery
(b) Condoms
(c) Copper-T
(d) Oral-pills

47. In human males, the testes lie in the scrotum, because it helps in the
(a) process of mating
(b) formation of sperms
(c) easy transfer of gametes
(d) secretion of estrogen

48. There is a greater possibility for the evolution of a new species in organisms which reproduce by
(a) binary fission
(b) budding
(c) fertilisation
(d) regeneration

49. Which is the most common method of reproduction in majority of fungi and bacteria?
(a) Budding
(b) Spore formation
(c) Binary fission
(d) Multiple fission
50. Which of the following is not an artificial method of vegetative propagation?
(a) Cutting
(b) Layering
(c) Budding
(d) Grafting

51. Many unicellular organisms reproduce by the process of
(a) fission
(b) ovulation
(c) regeneration
(d) non-disjunction

52. The ability of an organism to develop whole body from a broken piece or fragment is called
(a) binary fission
(b) budding
(c) multiple fission
(d) regeneration

53. Pollen grains are produced by
(a) ovary
(b) ovule
(c) apther
(d) corolla

54. The fertilisation of human egg by the sperm takes place in
(a) vagina
(b) uterus
(c) ovary
(d) oviduct

55. Which of the following is a primary sex organ in a mammal?
(a) Ovary
(b) Vagina
(c) Uterus
(d) Mammaiy glands

56. The ability to reproduce is lost in a female after
(a) fertilisation
(b) menstruation
(c) gamete formation
(d) menopause

57. When a sperm is deposited into the vagina which route does it travel?
(a) Vagina → Oviduct → Uterus → Cervix
(b) Vagina → Ovary → Uterus → Oviduct
(c) Vagina → Cervix → Uterus → Oviduct
(d) Vagina → Uterus → Cervix → Oviduct
58. In case the ova does not fertilise, which of the following events will take place?
(a) Menstruation
(b) Pregnancy
(c) Implantation
(d) Ovulation

59. When the foetus is growing inside the uterus it needs nutrients. Which part provides these nutrients?
(a) Placenta
(b) Amniotic sac
(c) Oviduct
(d) Uterus

60. What marks the beginning of the reproductive life of a woman?
(a) Menopause
(b) Menarche
(c) Fertilisation
(d) Ovulation

61. Where does fertilisation take place?(a) Uterus
(b) Vagina
(c) Fallopian tube
(d) Cervix

62. A pair of duct arising from testis, which carry sperms are
(a) fallopian tube
(b) vas deferens
(c) oviduct
(d) urethra

63. In the list of organisms given below, those that reproduce by the asexual method are [NCERT Exemplar Problems]
(i) banana
(ii) dog
(iii) yeast
(iv) Amoeba
(a) (ii) and (iv)
(b) (i), (iii)
(c) (i) and (iv)
(d) (ii), (iii) and (iv)

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