Practice Questions

TLS Online TPP Program

#Question id: 39850

Q. A student performs a BLAST search and finds that Protein A and Protein B share 65% sequence similarity over their entire length. Which of the following statements is scientifically accurate regarding their relationship?

#Bio-Informatics

Protein A and Protein B share 65% homology.
The two proteins are 65% identical in their primary sequence.
Protein A and Protein B are homologous, provided the similarity is statistically significant.
65% similarity is insufficient to suggest an evolutionary relationship; they are likely analogous.

More Questions

#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 Phase	A. Exponential decrease in the number of living cells.
2. Log Phase	B. Adaptation to new environment; synthesis of enzymes.
3. Stationary Phase	C. Nutrient depletion leads to equal rates of growth and death.
4. Death Phase	D. Uniform and rapid cell division; population doubles.

#Question id: 40189

#Applied Microbiology

Read the following statements regarding the bacterial growth curve and choose the correct option.

Statement I: In the Lag phase, there is an immediate increase in the cell number as bacteria start dividing instantly.

Statement II: Secondary metabolites (like antibiotics) are predominantly produced during the Stationary phase.

#Question id: 40190

#Applied Microbiology

Assertion (A): The generation time is shortest during the exponential (log) phase.

Reason (R): In the exponential phase, bacteria are adapting to the environment and repairing cellular damage.

#Question id: 40191

#Applied Microbiology

Which of the following terms describes organisms that require high hydrostatic pressure for growth and reproduction?

#Question id: 40192

#Applied Microbiology

Match the organism type in Column A with its specific environmental requirement in Column B.

#Question id: 40193

#Applied Microbiology

Read the following statements:

Statement I: Obligate anaerobes cannot survive in the presence of oxygen because they lack the enzymes catalase and superoxide dismutase.

Statement II: Facultative anaerobes require oxygen for growth and cannot grow in its absence