Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 1017
TLS Online TPP Program

#Question id: 1042

A student complains that it makes no sense to worry about coliform bacteria in water, since we naturally possess harmless coliforms in our intestines anyway. Why do regulatory agencies worry about coliform bacteria in water supplies, then?

#Unit 4. Cell Communication and Cell Signaling

  1. The coliforms in our intestines can sometimes turn harmful, causing intestinal infections. We need to constantly be on guard against this happening. Coliforms in water might add to this potential problem.

  2. Not all coliforms are harmless and symbiotic with human beings. Some may carry genes/proteins that can make them dangerous to humans. It's best to keep coliforms OUT of our drinking water, since it's difficult to identify which ones might be harmless and which ones might be harmful.

  3. Regulatory agencies are worried that multiple types of coliforms in water might lead to greater antibiotic resistance in the bacterial populations. They try to keep them out of water to keep antibiotic resistance levels down.

  4. Regulatory agencies simply need something to do to justify their existence. There is no real danger from coliforms in water supplies.

More Questions
TLS Online TPP Program

#Question id: 11818

#Unit 6. System Physiology – Plant

Cytokinin signals to nuclear-localized response regulators  by transferring the phosphate group to an aspartate on the receiver domain of the ARR. The ARR response regulators are encoded by multigene families, They fall into two basic classes:

I) Type-A ARRs

II)Type-B ARRs

a) The products of which are made up solely of a receiver domain

b) Receiver domain also include an output domain containing DNA-binding  transcription activation sites

c) Which negatively regulate cytokinin signaling by interacting with other proteins in a manner dependent on the phosphorylation state

d) Which are activated by phosphorylation, which enables them to regulate the transcription of a set of target genes

e) Which are targeted by F-box proteins called KISS ME DEADLY (KMD) proteins negatively regulates the cytokinin response

Which of the following are the correct explanation of the given ARRs types  classes of response regulator?
TLS Online TPP Program

#Question id: 18609

#Unit 13. Methods in Biology

An experiment performed using cell for replication and test tube for PCR by using two conditions of radio labelling
1) by radio labeling primer
2) by radio labeling dNTP
 the most possible result will be
TLS Online TPP Program

#Question id: 2403

#Unit 2. Cellular Organization

In autotrophic bacteria, where is chlorophyll located?
TLS Online TPP Program

#Question id: 29043

#Unit 10. Ecological Principles

The actual climatic conditions that organisms live in vary considerably within one climate is referred to as___
TLS Online TPP Program

#Question id: 2402

#Unit 2. Cellular Organization

An organism with a cell wall would most likely be unable to take in materials through ________.