General
✓✗Choose the correct sequence of stages of growth curve for bacteria.
- Lag, log, stationary, decline phase
- Lag, log, decline, stationary phase
- Stationary, lag, log, decline phase
- Decline, lag, log phase, stationary
General
✓✗The DNA of E.coli is
- double stranded and linear
- double stranded and circular
- single stranded and linear
- single stranded and circular
General
✓✗The fungus without mycelium is
- Phytophthora
- Rhizopus
- Saccharomyces
- Microsporum
General
✓✗Photosynthetic pigments of purple and green bacteria prefer far red and green light. Their photosynthetic pigment is/are
- bacterioviridin
- bacteriochlorophyll ‘a’
- bacteriochlorophyll ‘b’
- all above
General
✓✗One of the following bacteria helps in fermentation
- Staphylococcus
- Lactobacillus
- Salmonella
- Aspergillus
General
✓✗Oxygen is not produced during photosynthesis by
- Green sulphur bacteria
- Nostoc
- Cycas
- Chara.
General
✓✗Yersinia pestis is causative agent of
- syphilis
- leprosy
- whooping cough
- plague
General
✓✗Antibiotics cure disease by -
- Competitive Inhibition
- Fighting with the disease causing organism
- Deactivating pathogen
- Relieving the pain
General
✓✗Teichoic acid is present in
- Gram positive bacteria
- Gram negative bacteria
- Spirochaete
- Actinomycetes
General
✓✗Thermococcus, Methanococcus, and Methanobacterium exemplify
- Archaebacteria that contain protein homologous to eukaryotic core histones.
- Archabeacteria that lack anyhist ones resembling those found in eukaryotes but whose DNA is negatively supercoiled.
- Bacteria whose DNA is relaxed or positively super- coiled but which have a cytoskeleton as well as mitochondria.
- Bacteria that contain a cytoskeleton and ribosomes.
General
✓✗Koch's postulates are not applicable to
- Mycobacterium leprae
- Tuberculosis
- Pneumonia
- Cholera
General
✓✗Amoebic dysentery is due to infection of
- Entamoeba histolytica
- E. gingivalis
- E hartmanni
- both Entamoeba histolytica and E hartmanni
General
✓✗Which of the following are wall less prokaryotes -
- Plasmodium
- Bacteria
- Cyanobacteria
- Slime molds
General
✓✗Cyanobacteria existed __________ years ago.
- 2.9 billion
- 3.4 billion
- 1 million
- 44 thousand
General
✓✗Bouts of malaria is due torelease of
- Merozoites and Haemozoin
- Cryptozoites and Erythrozoin
- Sporozoites and Haemozoin
- Microcryptomerozoites and Hematin