Test Preparation on Monera - Biology Test Series for NEET - 2020
In Escherichia coli
Membrane-bound organelles are absent in
How many organisms in the list given below are autotrophs
Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter,
Streptomyces, Sacharomyces, Trypanosoma, Porphyra,
Wolfia
(c) Nostoc, Chara, Porphyra and Wolfia are
Photoautotrophs while Nitrosomonas and Nitrobacter
are chemoautotrophs.
Some hyperthermophilic organisms that grow in highly
acidic (pH2) habitats belong to the two groups
The main difference between Gram positive and Gram
negative bacteria lies in the composition of
(b) In G+ (Gram–positive bacteria) cell wall is 200–300 Å
thick having mucopeptides 85% and lipids 1–2% while in
G– (Gram-negative bacteria) cell wall is 100–200 Å thick
and mucopeptides are 10–12% and lipids 80–90%.
Match the following pairs correctly and choose the right
combination
Column I Column II
A. Escherichia coli 1. 'nif' gene
B. Rhizobium melilotae 2. Digests hydrocarbon of
crude oil
C. Bacillus thurigiensis 3. Production of human insulin
D. Pseudomonas putida 4. Biological control of fungal disease
5. Bio-decomposed insectiside
The habitat of E. coli is
Choose the wrong statements regarding bacterial cell
A. Glycocalyx is the outer most envelope in bacteria
B. The glycocalyx could be a loose sheath called capsule
C. The glycocalyx may be thick and tough called slime
layer
D. A special structure formed by the plasma membrane is
called mesosome
E. Small bristle like fibres sprouting out of the cell are
called fimbriae
Which one of the following organisms is not an example of
eukaryotic cells
(c) E. coli is a prokaryotic bacterium.
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