1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Elodia [21]
3 years ago
11

C.elegans is a model organism and was the first eukaryotic organism to have its genome sequenced. The free-living nematode is of

ten used in laboratories investigating nervous system development with all 302 of its neurons and their effectors categorized. Interesting control mechanisms have been investigated with reproduction, particularly with egg-laying in the nematode. There are 16 muscles, 2 types of neurons, and multiple receptors involved in the process of laying eggs in C.elegans, and there are mutations in all of those structures for the study of the process. One particular mutation that prevents the laying of eggs by the worm is rescued by the neurotransmitter, serotonin. That rescue suggests that the mutation is most likely in which of the following?
A. one of the muscles needed for egg-laying
B. a receptor for serotonin on cells needed for egg-laying
C. a pre-synaptic neuron involved in egg-laying
D. a post-synaptic neuron involved in egg-laying
Biology
1 answer:
zaharov [31]3 years ago
8 0

Answer:

C. a pre-synaptic neuron involved in egg-laying

Explanation:

Serotonin (5-HT) is a neurotransmitter, i.e., a molecule that binds to specific receptors and thus transmits signals from one pre-synaptic neuron to another target cell. In humans, serotonin is involved in many physiological functions including sleep, mood, emotions, appetite, digestion, etc. Moreover, <em>Caenorhabditis elegans</em> is a model organism widely used in neuroscience research in order to understand neuromodulation at the level of individual neurons. In <em>C. elegans,</em> serotonin modifies behavior by regulating neuronal excitability and synaptic efficiency. Moreover, also in <em>C. elegans,</em> it has been shown that serotonin induces egg-laying and also provides a feedback regulatory mechanism by inhibiting the activity of the pre-synaptic neurons that release it. In consequence, in this case, it is expected that serotonin rescues the loss of function of serotonin receptors required for egg-laying by providing a regulatory feedback loop that contributes to serotonin adaptation.

You might be interested in
What are the two types of orientation behavior? Provide an example of each.
netineya [11]

Answer:

Two types of orientation behavior are as follows:

Taxis behavior:

This is a type of orientation behavior that mainly occur in response towards the external stimulus. Taxis may be positive (movement towards the stimulus) or negative ( movement away from the stimulus). Different types of taxis behavior are phototaxis, aerotaxis, chemotaxis and magnetotaxis.

Kinesis:

Kinesis may be defined as a type of orientation behavior that can change the complete movement or orientation of the organism. Kinesis is a random movement and organism can move in either direction. Different type of kinesis are klinokinesis and orthokinesis.

6 0
3 years ago
How are fossil fuels taken from earth?
kiruha [24]

Answer:Extracting fossil fuels. There are two main methods for removing fossil fuels from the ground: mining and drilling. Mining is used to extract solid fossil fuels, such as coal, by digging, scraping, or otherwise exposing buried resources.

Explanation:

4 0
2 years ago
The property of water that allows the basilisk lizard to run across its surface is.
Sindrei [870]

Answer:

High surface tension caused by the polar quantities of water.

6 0
1 year ago
What early species may have given rise to new species over time
NikAS [45]
(I'm not 100% positive on this) Dinosaurs, many chickens and birds are related to dinosaurs
3 0
3 years ago
Read 2 more answers
If the genetically transformed cells have acquired the ability to live in the presence of the antibiotic ampicillin, then what m
V125BC [204]

Answer:

The plasmid must express a gene for ampicillin resistance (the protein product of  the <em>bla</em> gene codes for beta-lactamase, the protein that breaks down ampicillin). The colonies on the ampicillin plate are antibiotic resistant. This means that they have taken up the transformed plasmids expressing both the <em>bla</em> gene and the GFP gene.

Explanation:

The transformation involved the genetic modification of a plasmid to incorporate the gene encoding the green fluorescent protein (GFP) from jelly fish. GFP makes cells glow under UV light.

In genetic engineering, scientists use antibiotic resistance as markers to indicate cells that have been transformed. By incorporating an antibiotic resistance gene such as <em>bla</em> into the vector (plasmid) and then growing the cells in antibiotic media, scientists determine which colonies have taken up the plasmid. Therefore, if the cells survive, this means that they contain the plasmid with antibiotic resistance gene as well as the GFP gene.

5 0
3 years ago
Other questions:
  • A chemical formula would indicate what
    13·2 answers
  • Tom is scheduled to have surgery next week in order to remove a large tumor from his frontal lobe. after his procedure, tom is m
    14·1 answer
  • Which organization controls most of the worlds oil production?
    15·1 answer
  • How are the blunt and sharp pipettes
    7·1 answer
  • Describe the structure of the<br> cell membrane and its components
    7·1 answer
  • deposits of coal have been found beneath the ice of Antarctica. But coal only forms from warm swamps. How can coal be found so n
    10·2 answers
  • How is the function of NAD<br> similar to that of NADP+?
    6·2 answers
  • 50 POINTS AND BRAINLIEST PLEASE HELP ASAP
    6·1 answer
  • What atoms make up water molecules sunlight molecules and carbon dioxide molecules
    10·1 answer
  • Diffusion does not require any energy.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!