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algol [13]
3 years ago
14

explain how repressible and inducible operons differ and how those differences reflect differences in the pathways they control

Biology
1 answer:
Sonja [21]3 years ago
7 0

Answer

Operons are cluster of coordinated genes, including structural genes, an operator gene, and a regulatory gene.

Explanation:

In the The repressible operons, The transcription is usually on and repressor is in inactive form, So the specific genes are transcribed. While a regulatory molecule act as corepressor and binds to repressor protein to activate it. The repressor protein cause the inactivation of repressible operon (as the name indicate). E.g., Tryptophan Repress the trp operon.

A high level of product act as regulatory molecule (Corepressor) and turn off the operon, So anabolic pathways or synthesis of essential components are controlled by repressible operon.

In the Inducible operons, the transcription is usually off and repressor is in active form. So there is no transcription of genes. Specific Metabolite cause the activation of operon  e.g lactose cause the induction of lac operon.

As a metabolite induces the operon, So they control the Metabolic pathways or breakdown of a neutrient.

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Sensory receptor cells convert a stimulus, such as an odor molecule or light, into an electrical signal that is conveyed to the
swat32

Answer:

Sensory transduction.

Explanation:

Sensory transduction may be defined as the process by which sensory stimulus are transformed in the body. The receptor cell is mainly involved in the sensory transduction process.

The sensory receptor cell like a light or an odor is converted into the electrical signal by the process of signal transduction. The information is then conveyed to the nervous system in the form of electrical signals.

Thus, the correct answer is signal transduction.

7 0
3 years ago
A cell with 22 chromosomes undergoes mitosis. How many nuclei result from this process?
kondor19780726 [428]

Answer:

Explanation:

Mitosis is the phase of the cell cycle where the nucleus of a cell is divided into two nuclei with an equal amount of genetic material in both the daughter nuclei. It succeeds the G2 phase and is succeeded by cytoplasmic division after the separation of the nucleus.

5 0
2 years ago
In examining a cell using the electron microscope, you see a structure that is composed of two membranes, contains numerous pore
Effectus [21]
<h2>Nuclear Envelope</h2>

Explanation:

  • <em>The endomembrane system</em> includes the nuclear envelope, the <em>endoplasmic reticulum, Golgi mechanical assembly, lysosomes, vesicles, just as the plasma layer</em>
  • These cell parts cooperate to <em>alter, bundle, tag, and transport layer lipids and proteins </em>
  • The nuclear envelope is a double membrane, implying that there are <em>two lipid bilayers</em>
  • The nuclear lamina, a netlike cluster of <em>protein filaments, associates the layers of the nuclear envelope</em>
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3 years ago
What is the function of the capsule in a prokaryotic cell?
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They protect bacterial cells from white blood cells.
8 0
3 years ago
Environmental factors can influence natural selection because they can increase or decrease
olchik [2.2K]

Answer:

Environmental factors can influence natural selection because they can increase or decrease the amount of genetic variation in a population.

Explanation:

Natural selection is a process that involves the survival of species through changes in the expression of their genes, making possible the process of adaptation to environmental changes. It is one of the explanations for the biological evolution of species.

The second premise, necessary for natural selection to be possible, implies the existence of a variability (genetics) of traits among individuals in a population.

The other premises of natural selection are the faculty of traits to be inheritable and that genetic variability should lead to reproductive success and survival.

  • <em>The other options are not related to the process of natural selection, since it is not possible for natural selection to increase or decrease the number of chromosomes, in addition to the fact that genetic variability must be observed in a population, not in a single individual, to be considered natural selection </em>
4 0
3 years ago
Read 2 more answers
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