Botany Practice Test || Exam Questions (Questions 31-50)

BOTANY Practice test (Questions 31-50)

31. Classical Smog is:

A) Condensation of CO2 B) Smog formed by SO2 C) Particulate matter suspended in air D) Aggregation of NOx and VOCs

32. The term genomics was coined by:

A) T H Roderick B) A Flemming C) F Sanger D) H Winkler

33. Reciprocal translocation is:

A) A barr body B) A Short chromosome C) Robertsonian translocation D) An Isochromosome

34. Technique used for separation of immunoglobulins is:

A) Paper chromatography B) SDS PAGE C) Affinity chromatography D) Gas chromatography

35. Advantage of microarrays is

A) Assay provides qualitative data B) Single color is used in DNA microarray C) Only certain genes can be analyzed in one test D) It is very sensitive and rapid and allows for the direct comparison of expression

36. Albinism in plants is caused by:

A) Duplicate recessive genes B) Recessive epistatic gene C) Dominant complementary genes D) Recessive lethal alleles

37. Specimen selected from the original material to serve as nomenclatural type when holotype was not designated:

A) Holotype B) Isotype C) Lectotype D) Paratype

38. The product of assimilation and net production efficiency is ---- efficiency.

A) Net assimilation B) Exploitation C) Assimilation D) Gross production

39. Diploid organism with an extra chromosome is:

A) Monosomy B) Nullisomy C) Trisomy D) Monoploidy

40. Identify the correct statement:

A) Malvaceae generally have ovules on free central placentation B) Bulbophyllum belongs to Family Orchidaceae C) Hopea acuminata belongs to Family Brassicaceae D) In Solanaceae the flower is Epigynous

41. Number of nucleotides in yeast alanyl tRNA:

A) 17 B) 67 C) 77 D) 88

42. A non radioactive label used in molecular probe:

A) 32P B) Digoxigenin C) Palindromes D) Thymidine dimer

43. DDBJ is:

A) Biological database B) Protein sequence database C) Protein structure database D) Multiple sequence alignment

44. A retro virus is:

A) Herpes virus B) HTLV-1 C) Hepatitis B virus D) Adenovirus

45. Identify the dye yielding plants:

A) 1 only (Acacia catechu, Curcus sativus, Morinda tinctoria) B) 2 only (Memecylon umbellatum, Indigofera tinctoria, Cuminum cyminum) C) 3 only (Ocimumbasilicum, Apium graveolens, Cinnamomum zeylanicum) D) 1 & 3 only

46. Match the following (bacterial features) in List 1 with (corresponding descriptions / roles) in List 2:

List 1 List 2

a. F-pilus 1. Horizontal gene transfer by bacteriophages

b. Flagella 2. Motility structures used for locomotion

c. Transformation 3. Uptake of foreign DNA from the environment

d. Transduction 4. Structure involved in bacterial conjugation

A) a-4, b-1, c-3, d-2 B) a-2, b-4, c-1, d-3 C) a-4, b-2, c-3, d-1 D) a-3, b-1, c-4, d-2

47. What role do quorum-sensing molecules play in bacterial biofilms?

A) They allow bacteria to sense nutrient levels in their environment B) They enable bacteria to recognize and kill neighbouring bacteria C) They coordinate gene expression in response to population density D) They inhibit the conjugation process in nearby cells

48. Which of the following best describes the lysogenic cycle of bacteriophages?

A) The phage DNA is immediately replicated and leads to cell lysis B) The phage DNA is integrated into the host genome and remains dormant C) The phage uses reverse transcriptase to insert its RNA into the host D) The phage DNA does not enter the host genome but still kills the host cell

49. Viroids differ from viruses in that Viroids:

A) Lack a protein coat B) Have double-stranded DNA as genetic material C) Replicate in animal cells only D) Have complex capsid structures

50. Which type of life cycle is characteristic of the green algae, Ulva (Chlorophyceae)?

A) Diplontic B) Haplontic C) Haplodiplontic D) None of these

Your Results: