biology online free

biology online free
pre medical biology online  free Test
Free Biology Online Practice Test
pre medical biology online objective questions
coaching for pre med test
Check your preparation for biology courses including Botany and Zoology
Pre med online test practice for pre medical colleges

Zoology

1. In malaria, the product released by mosquito into blood that causes chill and fever, is called:

(a) Heamatin

(b) Schuffner’s dots

(c) Haemozoin

(d) Haemotoxin

Ans. (c)

2. In Amoeba, the contractile vacuole is present:

(a) Near the trailing end

(b) Near the advancing end

(c) At the middle of the body

(d) Any where inside the body

Ans. (a)

3. The trisomy for 21st chromosome is called:

(a) Down’s syndrome

(b) Turner’s syndrome

(c) Sickle cell anaemia

(d) Klinefelter’s syndrome

Ans. (a)

4. ‘Mammalian thymus’ is mainly concerned with:

(a) Regulation of body temperature

(b) Regulation of body growth

(c) Immunological functions

(d) Secretion of thyrotropin

Ans. (c)

5. Which of the following is the largest gland in an adult man?

(a) Thymus

(b) Liver

(c) Thyroid

(d) Pancreas

Ans. (b)

6. In Pheretima, septa are absent between which segments?

(a) 3/4 and 9/10

(b) 4/5 and 8/9

(c) 5/6 and 7/8

(d) 7/8 and 6/7

Ans. (a)

7. During emergency which of the following hormone is secreted?

(a) Aldosterone

(b) Thyroxine

(c) Adrenaline

(d) Calcitonin

Ans. (c)

8. In which of the following animals, respiration occurs without any respiratory organ?

(a) Frog

(b) Fish

(c) Cockroach

(d) Earthworm

Ans. (d)

9. In cockroach, larval and nymphal characters are maintained by:

(a) Ecdysone

(b) Salivary glands

(c) Parotid gland

(d) Juvenile hormone

Ans. (d)

10. Which of the following is a transparent tissue?

(a) Tendon

(b) Fibrous cartilage

(c) Hyaline cartilage

(d) All of these

Ans. (c)

11. Rh factor is present in:

(a) All vertebrates

(b) All mammals

(c) All reptiles

(d) Man and rhesus monkey only

Ans. (d)

12. In rabbit, end of a long bone is connected to another by:

(a) Tendon

(b) Ligaments

(c) Muscle

(d) Cartilage

Ans. (b)

13. Which of the following cell type is capable of giving rise to other cell types in sponges?

(a) Thesocytes

(b) Pinacocytes

(c) Cnidocytes

(d) Archaeocytes

Ans. (d)

14. Thigmotaxis is not shown by:

(a) Paramecium

(b) Amoeba

(c) Ascaris

(d) Hydra

Ans. (c)

15. Which is correctly matched?

(a) Apiculture—honey bee

(b) Pisciculture—silk moth

(c) Sericulture—fish

(d) Aquaculture—mosquito

Ans. (a)

16. Changes that allow the conversion of larva into adult, is called:

(a) Metagenesis

(b) Alternation

(c) Metamorphosis

(d) Metastasis

Ans. (c)

17. Which of the following is secreted by mast cell?

(a) Histamine

(b) Heparin

(c) Serotonin

(d) All of these

Ans. (d)

18. 5th cranial nerve of frog is called:

(a) Optic nerve

(b) Vagus

(c) Trigeminal

(d) Opthalmic

Ans. (c)

19. Animals having a built in thermostat to maintain constant body temperature are known as:

(a) biothermic

(b) poikilothermic

(c) oligothermic

(d) homeothermic

Ans. (d)

20. In earthworm, neurons are:

(a) Motor

(b) Associated

(c) Sensory

(d) All of these

Ans. (d)

21. In sex linkage, the specialty is:

(a) Atavism

(b) Criss-cross inheritance

(c) Reversion

(d) Gene flow

Ans. (b)

22. Vitamin-D is synthesized in skin by the action of sunlight on:

(a) Cholesterol

(b) 7-hydroxy cholesterol

(c) Cephalin cholesterol

(d) All of the above

Ans. (b)

23. The intermediate host of Schistosoma4s:

(a) Snail

(b) Mosquito

(c) Housefly

(d) Sheep

Ans. (a)

24. The islets of Langerhans are found in:

(a) Pancreas

(b) Stomach

(c) Liver

(d) Alimentary canal

Ans. (a)

25. In Klinefelter’s syndrome, the sex chromosome compliment is

(a) 22 A + XXY

(b) 22 A + XO

(c) 22 A + XY

(d) 22 A + XX

Ans. (a)

Botany

26. Lichen is the pioneer vegetation on which succession?

(a) Hydrosere

(b) Lithosere

(c) Psammosere

(d) Xerosere

Ans. (b)

27. Law of limiting factor was given by:

(a) Leibig

(b) Blackman

(c) Calvin

(d) Arnon

Ans. (b)

28. In Pinus, male cone bears a large number of:

(a) Ligules

(b) Anthers

(c) Micro-sporophylls

(d) Mega-sporophylls

Ans. (c)

29. Insectivorous plants grow in soil:

(a) Rich in nitrates

(b) Rich in phosphates

(c) Deficient in nitrates

(d) Rich in calcium

Ans. (c)

30. Induction of flowering by low temperature treatment is

(a) Vernalisation

(b) Cryobiology

(c) Photoperiodism

(d) Prunning

Ans. (a)

31. Decomposers are:

(a) autotrophs

(b) autoheterotrophs

(c) organotrophs

(d) heterotrophs

Ans. (c)

32. ‘Club moss’ belongs to:

(a) Algae

(b) Ptridophyta

(c) Fungi

(d) Bryophyta

Ans. (b)

33. Cleavage polyembryony occurs in:

(a) Pinus

(b) Mini Cycas

(c) Gycas

(d) Ephedra

Ans. (a)

34. Edible part of mushroom is:

(a) Basidiocarp

(b) Secondary mycelium

(c) Primary mycelium

(d) Tertiary mycelium

Ans. (a)

35. Which is the major crop in Asia?

(a) Rice

(b) Sugarcane

(c) Jowar

(d) Millet

Ans. (a)

36. Most nutritious among the following is:

(a) Wheat

(b) Maize

(c) Bajra

(d) Rice

Ans. (c)

37. Which of the following plant product is the hardest?

(a) Lignin

(b) Cutin

(c) Suberin

(d) Sporopollenin

Ans. (d)

38. ‘Ruminate endosperm’ is found in:

(a) Cruciferae

(b) Asteraceae

(c) Euphorbiaceae

(d) Annonaceae

Ans. (d)

39. Guttation is due to:

(a) Transpiration

(b) Root pressure

(c) Osmosis

(d) Diffusion

Ans. (b)

40. The following is used to get desired breed of plants.

(a) Tissue culture

(b) Genetic engineering

(c) Inbreeding

(d) Ikebana

Ans. (b)

41. For production of haploids, we culture:

(a) Shoot tip

(b) Anther

(c) Root tip

(d) None of these

Ans. (b)

42. Calyptra is derived from:

(a) Archegonia

(b) Capsule

(c) Antheridia

(d) Columella

Ans. (a)

43. Late blight of potato is caused by:

(a) Ustilago

(b) Pseudomonas

(c) Phytophthorc nfestans

(d) Colletotricum falcatum

Ans. (c)

44. ‘Clamp connection’ are observed in:

(a) Basidiomycetes

(b) Zygomycetes

(c) Ascomycetes

(d) Oomycetes

Ans. (a)

45. Leaf abscission is caused by:

(a) ABA

(b) cytokinin

(c) auxin

(d) gibberellin

Ans. (a)

46. What is the main cause for the extinction of some species in tropical forest?

(a) Deforestation

(b) Afforestation

(c) Pollution

(d) Soil erosion

Ans. (a)

47. Wilting of plant is due to:

(a) Blockage of phloem

(b) Blockage of xylem

(c) When some root and phloem are removed

(d) Tracheid is blocked

Ans. (b)

48. Most accepted theory for ascent of sap is:

(a) Capillarity theory

(b) Root pressure theory

(c) Pulsation theory

(d) Transpiration pull

Ans. (d)

49. Which enzyme converts glucose into alcohol?

(a) Zymase

(b) Diastase

(c) Invertase

(d) Lipase

Ans. (a)

50. Crop rotation helps in:

(a) Increase soil fertility

(b) Decrease soil erosion

(c) Decrease soil fertility

(d) Decrease water loss

Ans. (a)

Posted in: Biology , botany , Question and Answers , quiz , test , Zoology