General
✓✗Difference between eukaryotes and prokaryotes is
- ss circular DNA in prokaryotes
- Histone with prokaryotic DNA
- Operon in eukaryotes
- Membrane-bound organelles in eukaryotes
General
✓✗The conversion of plasmasol into plasmagel and vice versa is
- Bio-chemical phenomenon
- Physio-chemical phenomenon
- Chemical phenomenon
- Physical phenomenon
General
✓✗Which one of the following is a slime mould?
- Physarum
- Thiobacillus
- Anabaena
- Rhizopus
General
✓✗White rust of crucifers is caused by
- Albugo candida
- Sclerospora
- Phytophthora infestans
- Pythium debaryanum
General
✓✗Arrange the following discoveries in chronological order.
A. W.M. Stanley showed that viruses could be crystallised.
B. T.O. Diener discovered viroids.
C. D.J. Ivanowsky's work on the causal agent of mosaic disease of tobacco.
D. M.W. Beijerinck described the infectious fluid as 'contagium vivum fluidum'.
A. W.M. Stanley showed that viruses could be crystallised.
B. T.O. Diener discovered viroids.
C. D.J. Ivanowsky's work on the causal agent of mosaic disease of tobacco.
D. M.W. Beijerinck described the infectious fluid as 'contagium vivum fluidum'.
- D, C, A, B
- C, A, D, B
- C, D, B, A
- C, D, A, B
General
✓✗A bacterial culture containing 4 x 103 cells per mL reaches 1.28 x 105 cells per mL after 150 minutes of exponential growth. What is the generation time?
- 25 minutes
- 32 minutes
- 30 minutes
- 37.5 minutes
General
✓✗Lichens are pioneer of vegetation in a
- xerosere
- hydroponics
- marine life
- hydrosere
General
✓✗Pure culture of bacteria was first obtained by
- A. Leeuwenhoek
- Louis Pasteur
- Lister
- Robert Koch
General
✓✗Which one of the following is wrong for fungi?
- They are eukaryotic.
- All fungi possess a purely cellulosic cell wall.
- They are heterotrophic.
- They are both unicellular and multicellular.
General
✓✗Which kingdom was introduced in four kingdom classification and who proposed it?
- Protista and Copeland
- Plantae and Linnaeus
- Monera and Whittaker
- Monera and Copeland
General
✓✗Which among the following is not a prokaryote?
- Saccharomyces
- Mycobacterium
- Nostoc
- Oscillatoria
General
✓✗Single-celled eukaryotes are included in
- Protista
- fungi
- archaea
- monera.
General
✓✗In the two kingdom system, which of the following groups of organisms were all placed in Kingdom Plantae, although Whittaker later separated them into different kingdoms?
- Mosses, ferns and gymnosperms
- Angiosperms and gymnosperms
- Bacteria, blue-green algae, fungi, mosses and ferns
- Mosses, liverworts and hornworts
General
✓✗Select the correct combination of statements.
(i) Chlamydomonas and Chlorella are placed in Protista.
(ii) Mycoplasma and Nostoc are placed in Monera.
(iii) Yeast is placed in Protista.
(iv) Paramoecium and Plasmodium are placed in Protista.
(i) Chlamydomonas and Chlorella are placed in Protista.
(ii) Mycoplasma and Nostoc are placed in Monera.
(iii) Yeast is placed in Protista.
(iv) Paramoecium and Plasmodium are placed in Protista.
- (i) and (iii) only
- (i), (ii) and (iv) only
- (ii), (iii) and (iv) only
- (i), (ii), (iii) and (iv)
General
✓✗Which of the following is a bacterial disease?
- Red rust of tea
- Citrus canker
- Red rot of sugarcane
- Late blight of potato