TLS Online TPP Program

#Question id: 40515


Match the taxonomist with their contribution

Column IColumn II
A. Linnaeus1. Phylogenetic classification
B. Whittaker2. Binomial nomenclature
C. Hennig3. Five kingdom classification
D. Mayr4. Biological species concept

#Environmental Science
  1.  A-2, B-3, C-1, D-4
  2.  A-3, B-2, C-4, D-1
  3. A-2, B-1, C-3, D-4
  4.  A-4, B-3, C-2, D-1
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TLS Online TPP Program

#Question id: 40183

#Applied Microbiology

Which of the following components is unique to the cell wall of Gram-positive bacteria and is responsible for its negative charge?

TLS Online TPP Program

#Question id: 40184

#Applied Microbiology

Choose the correct option regarding the bacterial cell wall.

Assertion (A): N-acetylmuramic acid (NAM) is a crucial component of the bacterial cell wall found in both Gram-positive and Gram-negative bacteria.

Reason (R): NAM residues serve as the attachment point for the peptide chains that cross-link the peptidoglycan layers. 

TLS Online TPP Program

#Question id: 40185

#Applied Microbiology

Read the following statements regarding the bacterial cell envelope:

Statement I: The outer membrane of Gram-negative bacteria contains Lipopolysaccharides (LPS), which consists of Lipid A, Core polysaccharide, and O-antigen.

Statement II: Lysozyme breaks down the bacterial cell wall by cleaving the glycosidic bond between Lipid A and the Core polysaccharide. 

TLS Online TPP Program

#Question id: 40186

#Applied Microbiology

Which of the following are TRUE regarding the difference between Gram-positive and Gram-negative cell walls?

(A) Gram-positive walls have a thick peptidoglycan layer.

(B) Gram-negative walls contain Porin proteins.

(C) Gram-positive walls contain a Periplasmic space.

(D) Gram-negative walls lack Teichoic acids. 

Choose the correct combination:

TLS Online TPP Program

#Question id: 40187

#Applied Microbiology

During which phase of the microbial growth cycle are cells most metabolically active and dividing at a constant maximum rate?

TLS Online TPP Program

#Question id: 40188

#Applied Microbiology

Match the growth phase in Column A with its correct characteristic in Column B.

Column A (Phase)Column B (Characteristic)
1. Lag PhaseA. Exponential decrease in the number of living cells.
2. Log PhaseB. Adaptation to new environment; synthesis of enzymes.
3. Stationary PhaseC. Nutrient depletion leads to equal rates of growth and death.
4. Death PhaseD. Uniform and rapid cell division; population doubles.