The "on/off" switch for an operon is called the

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#Question id: 28925

#Unit 4. Cell Communication and Cell Signaling

Which of the following signalling in which ligand is responsible for the degradation of their receptor?

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#Question id: 12485

#Unit 2. Cellular Organization

Following statements are regarding to the centrosome cycle of an animal cell.

A. During G1, the daughter procentrioles continue to elongate.

B. During S phase, daughter procentrioles form adjacent to maternal centrioles so that two pairs of centrioles become visible within the centrosome. 

C. During G2 phase, the centrosome contains a single pair of centrioles.

D. At the beginning of mitosis, the centrosome splits, with each pair of centrioles becoming part of its own centrosome. As they separate, the centrosomes organize the microtubule fibres that make up the mitotic spindle.

Which of the following option is correct? 

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#Question id: 3698

#Unit 3. Fundamental Processes

In this diagram of the process of DNA replication at a replication fork, the strand labeled B is the:

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#Question id: 17214

#Unit 7. System Physiology – Animal

What is the effect of alarm reaction on cardiac system?

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#Question id: 10853

#Unit 10. Ecological Principles

Plant parasites that lack chlorophyll and depend on their host for sustenance are referred to as