Question
Arrange the phases of bacterial growth in correct order : A. Stationary phase Choose the correct answer from the options given below :
B. Lag phase
C. Log (exponential) phase
D. Death phase
E. Inoculation into fresh medium
The correct answer is
E, B, C, A, D
Bacterial Growth Phases Order
The growth of a bacterial population in a closed system follows a predictable pattern known as the bacterial growth curve. Arranging the given stages in their correct chronological order is essential for understanding microbial dynamics.
Growth Phase Sequence
- E. Inoculation into fresh medium: This is the starting point where bacteria are introduced into a new environment suitable for growth.
- B. Lag phase: Following inoculation, bacteria initially adapt to the new medium. During this phase, there is little or no increase in cell number as the cells prepare for division.
- C. Log (exponential) phase: Once adapted, bacteria begin to divide rapidly. The population size increases exponentially, doubling at a constant rate.
- A. Stationary phase: The growth rate slows down and eventually equals the death rate. This occurs as nutrients become depleted and waste products accumulate, limiting further exponential growth.
- D. Death phase: Conditions become unfavorable, leading to a decline in the viable bacterial population. The death rate exceeds the growth rate.
Therefore, the correct sequence of the bacterial growth phases is E, B, C, A, D.
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Important Questions from Miscellaneous
- Which of the following relationships is/are not true?
(A). Most probable velocity = $\sqrt{\frac{2RT}{M}}$
(B). PV = $\frac{3}{2}kT$
(C). Compressibility factor Z = $\frac{pV}{nRT}$
(D). Average kinetic energy of gas = $\frac{1}{2}kT$
Choose the correct answer from the options given below - Match List-I with List-II
List-I List-II Electronic Configuration First Ionisation energy (kJ mol$^{-1}$) (A). ns$^2$ (I). 2100 (B). ns$^2$np$^1$ (II). 1400 (C). ns$^2$np$^3$ (III). 800 (D). ns$^2$np$^6$ (IV). 900
Choose the correct answer from the options given below: - The shielding constant of a 2p electron (calculated using Slater's rules) is
- Match List-I with List-II
List-I List-II Spectroscopy Property (A). Raman (I). Polarizability (B). FTIR (II). Dipole Moment (C). UV-Visible (III). Absorbance (D). NMR (IV). Spin
Choose the correct answer from the options given below: - The structure of protein comprises of:
(A). Primary structure of protein is associated with amino acids
(B). Secondary structure of protein is associated to peptides
(C). Tertiary structure of protein is associated with polypeptide chains
(D). Quaternary structure of protein is associated with polypeptide chains
Choose the correct answer from the options given below:
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