MCQ BIOLOGY PRACTICE SET 14.04.2021

MCQ BIOLOGY PRACTICE SET 14.04.2021

1. The strand of DNA acting as template for mRNA transcription is

I. coding strand

II. non-coding strand

III. sense strand

IV. anti sense strand

Choose the correct one from the codes given below

(a) I and II 

(b) II and IV 

(c) I and III 

(d) II and III

 

2. Consider the statement given below and choose the correct option from the given codes.

I. Menstrual cycle is present in all mammals.

II. Menstrual cycle is present in all primates.

III. Oestrous cycle occurs in all mammals.

IV. Most mammals are ovoviviparous.

(a) I, II and IV 

(b) II and III

(c) I, II, III and IV 

(d) Only II

3. A DNA molecule has radioactive thymidine. It is allowed to replicate in a medium containing simple thymidine (without radioactivity). In how many strands radioactive thymidine will be present after three replications?

(a) 4 .

(b) 8 

(c) 1 

(d) 2

4. A human male produces sperms with the genotype AB, Ab, aB and ab pertaining to the diallelic characters in equal proportions. What is the corresponding genotype of this person?

(a) AABB 

(b) AaBB 

(c) AaBb 

(d) AABb

5. The ovule in which the funicle, chalaza and micropyle lie in one vertical plane is called

(a) amphitropous 

(b) anatropous

(c) campylotropous 

(d) orthotropous

6. If 50 J energy is trapped by wheat plant. Then, how much energy will be available to eagle as food in the following food chain?

wheat plant -mice - snake - eagle

(a) 0.05 J 

(b) 0.005 J 

(c) 6.25 J 

(d) 0.5 J

 

7. The morphological self incompatibility occurs in flowers having heterostyly. It promotes

(a) Self-pollination 

(b) Cross-pollination

(c) Both (a) and (b) 

(d) None of these

8. Assisted reproductive technology IVF, involves transfer of

(a) ovum into the Fallopian tube

(b) zygote into the Fallopian tube

(c) zygote into the uterus

(d) embryo with 16 blastomeres into the Fallopian tube

9. Five kingdom system of classification suggested by RH Whittaker is not based on

(a) the presence or the absence of a well defined nucleus

(b) mode of nutrition

(c) mode of reproduction

(d) complexity of body organisation

10. Consider the following statements with reference to a normal human being.

I. Human saliva is slightly alkaline.

II. An adult human may secrete 1-1.5 L of saliva per day.

III. Saliva is secreted by six pairs of salivary glands in human beings.

IV. The salivary enzyme (ptyalin) breaks down cooked starch into maltose.

Which of the statements given above are correct?

(a) I, II and III 

(b) III and IV 

(c) I, III and IV 

(d) I, II, III and IV

11. Cryptorchidism is a condition of testes in which it is

(a) unable to descend in scrotal sac

(b) unable to produce sperms

(c) has been surgically removed

(d) remain undeveloped

12. Archaebacteria differ from eubacteria in

(a) cell membrane structure

(b) mode of nutrition

(c) cell shape

(d) mode of reproduction

13. Which character is not similar in all living organisms?

(a) Similar genetic code of amino acids

(b) Energy storage in ATP

(c) Type of proteins in the body

(d) Protein synthesis in ribosome

14. Haploids are more suitable for mutation studies than diploids. This is because

(a) haploids are reproductively more stable than diploids

(b) mutagens penetrate in haploids more effectively than in diploids

(c) haploids are more abundant in nature than diploids

(d) all mutations whether dominant or recessive are expressed in haploids

15. Which of the following is a hormone releasing Intra Uterine Device (IUD)?

(a) Multiload 375 

(b) LNG 20

(c) Cervical cap 

(d) Vault

16. Cyathium inflorescence shows

(a) scorpoid cyme showing central female, many peripheral male flowers

(b) scorpoid cyme showing central male, many peripheral female flowers

(c) dichasial cyme showing two whorls, one of male and another of female flowers

(d) dichasial cyme showing two whorls of 3-9 flowers

17. Which of the following product is obtained commercially from Monascus purpureus?

(a) Citric acid

(b) Blood cholesterol lowering statins

(c) Ethanol

(d) Streptokinase for removing clots from the blood vessels

18. Which one of the following is gaseous biogeochemical cycle in ecosystem?

I. Sulphur cycle 

II. Phosphorus cycle

III. Nitrogen cycle 

IV. Carbon cycle

Choose the correct one from the codes given below.

(a) I, II and IV 

(b) II and IV

(c) I, II and III 

(d) III and IV

19. Which of the following is not the modification of tap root system?

(a) Napiform 

(b) Fusiform

(c) Tuberous 

(d) Bulbil

20. Role of nucleus in plant morphogenesis was studied by

(a) Hammerling 

(b) Melchers

(c) Khorana 

(d) Robert Brown

21. Geitonogamy involves

(a) fertilisation of a flower by the pollen from another flower of the same plant

(b) fertilisation of a flower by the pollen from the same flower

(c) fertilisation of a flower by the pollen from a flower of another plant in the same population

(d) fertilisation of a flower by the pollen from a flower of another plant belonging to a distant population

22. Dwarf pea plant was treated with gibberellic acid, it became tall, as tall plants. If these pea plants are crossed with pure tall plants, what will be the phenotypic ratio in F1-generation.

(a) 50% tall and 50% dwarf plants

(b) 75% tall and 25% dwarf plants

(c) All dwarf plants

(d) 100% tall plants

23. Consider the following five statements.

I. In Equisetum, the female gametophyte is retained on the parent sporophyte.

II. In Ginkgo, male gametophyte is not independent.

III. The sporophyte in Riccia is more developed than that in Polytrichum.

IV. Sexual reproduction in Volvox is isogamous.

V. The spores of slime moulds lack cell walls.

How many of the above statements is/are correct?

(a) Four 

(b) One 

(c) Two 

(d) Three

24. Failure of a pair of homologous chromosomes to separate in anaphase-I of meiosis is referred to as:

(a) Non-disjunction 

(b) Disjunction

(c) Transformation 

(d) Transduction

25. Which of the following hormones are secreted by human placenta?

I. hCG 

II. hCS 

III. hCT

(a) I and II 

(b) I and III 

(c) II and III 

(d) I, II and III

26. Consider the following four statements.

I. The sporophyte in liverworts is more elaborate than that in mosses.

II. Salvinia is heterosporous.

III. The life-cycle in all seed-bearing plants is diplontic.

IV. In Pinus, male and fe male cones are borne on dif fer ent trees.

The two wrong statements together are

(a) I and III 

(b) I and IV 

(c) II and IV 

(d) I and II

27. Pheretima and its close relatives derive nourishment from

(a) soil insects

(b) small pieces of fresh fallen leaves of maize, etc

(c) sugarcane roots

(d) decaying fallen leaves and soil organic matter

28. Which of the following combination represents the vector of cloning capacity of DNA from smaller to bigger

(a) BAC, YAC, plasmid, cosmid

(b) Plasmid, BAC, YAC, cosmid

(c) YAC, plasmid, BAC, cosmid

(d) Plasmid, cosmid, BAC, YAC

29. Germinal epithelium of ovary has

(a) cuboidal cells 

(b) columnar cells

(c) squamous cells 

(d) stratified cells

30. A fall in Glomerular Filtrate Rate (GFR) activates

(a) adrenal medulla to release adrenaline

(b) posterior pituitary to release vasopressin

(c) adrenal cortex to release aldosterone

(d) juxtaglomerular cells to release renin

31. Consider the following statements and choose the correct code.

I. Allium sativum and Allium cepa belongs to the family – Solanaceae.

II. Tomato belongs to Liliaceae family.

III. Colchicum autumnale belongs to Liliaceae family.

IV. Pneumatophores are seen in Rhizophora.

Codes

(a) I, II and III 

(b) III and IV

(c) I, III and IV 

(d) I, II, III and IV

32. Select the correct option describing gonadotropin activity in a normal pregnant female.

(a) High level of FSH and LH stimulates the thickening of endometrium

(b) High level of FSH and LH facilitate implantation of the embryo

(c) High level of hCG stimulates the synthesis of oestrogen and progesterone

(d) High level of hCG stimulates the thickening of endometrium

33. Name the type of aestivation when sepal or petals in a whorl just touch one another at the margin without overlapping

(a) twisted aestivation 

(b) imbricate aestivation

(c) valvate aestivation 

(d) vexillary aestivation

34. Antigen binding site in an antibody is found between

(a) two light chains

(b) two heavy chains

(c) one heavy and one light chain

(d) either between two light chains or between one heavy and one light chain depending upon the nature of antigen

35. Stages in menstrual cycle are

(a) recovery phase and proliferative phase

(b) proliferative phase and secretory phase

(c) proliferative, secretory and menstrual phase

(d) recovery phase, secretory phase and phase of menstrual flow

36. Some hormones are given in column I. Match the source and function with column II and choose the

correct code.

Column I            Column II

A. Oxytocin           1. Pineal gland, regulate the circadianbehaviour

B. Progesterone    2. Posterior pituitary, facilitates birth

C. Thymus             3. neck region, proliferation and regulation of T-lymphocyte

D. Melatonin        4. Gonads, maintains pregnancy and uterus wall thickening

    Codes

      A    B    C    D 

(a) 2     4     3    1 

(b) 3     2    4     1

(c) 4      2    1    3 

(d) 1      2     3     4

37. ‘Hing’ of commerce is obtained from

(a) diatoms 

(b) waste petroleum product

(c) resinous exudate from root 

(d) it is not a plant production

38. An organism used as a biofertilizer for raising Cajanus cajan crop.

(a) Nostoc 

(b) Azospirillum

(c) Rhizobium 

(d) Azotobacter

39. In gynandromorph,

(a) Some cells of body contain XXY and some cells with genotype XO

(b) Some cells of body contain XX and some cells with genotype XY

(c) All cells with genotype XXY

(d) All cells with genotype XX

40. Which of the following is not under the control of dictyosomes?

I. Depositon of cell wall material

II. Cell plate formation

III. Extracellular secretion

IV. Autophagy

(a) I, II and IV 

(b) II, III and IV 

(c) IV only 

(d) I and III

Answers

1. (b) 2. (d) 3. (d) 4. (c) 5. (d) 6. (a) 7. (b) 8. (b) 9. (a) 10. (a)

11. (a) 12. (a) 13. (c) 14. (d) 15. (b) 16. (a) 17. (b) 18. (d) 19. (d) 20. (a)

21. (a) 22. (d) 23. (b) 24. (a) 25. (d) 26. (b) 27. (d) 28. (d) 29. (a) 30. (d)

31. (b) 32. (c) 33. (c) 34. (c) 35. (c) 36. (a) 37. (c) 38. (c) 39. (b) 40. (c)