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3 years ago

17. Which of the following statements are accurate?

Biology

1 answer:

Naddik [55]3 years ago

5 0

Answer:

A. Neurotransmitters can act as ligands.

B. Acetylcholine is a neurotransmitter. It can bind to an acetylcholine receptor on the surface of a cell. If this receptor is also a sodium channel, we would call acteylcholine a ligand and its receptor a ligand gated receptor.

Explanation:

Answer:

A. Neurotransmitters can act as ligands.

Explanation:

Neurotransmitter are chemicals that transfer signals between neurons and nerve cells. They control some physical and physiologocal activity such as appetite, food.

Acetycoline is an example of neurotransmitter and it is located in the parasympathetic nervous system. Ligand are substance that form complexes with biomolecule. They serve biological purpose with this biomolecule.

This ligand binds to target site. Neurotransmitter act as ligand by binding to receptor in the postsynaptic neuron and acetycoline a type of neurotransmitter can also serve as ligand they bind to acetycoline receptor on cell surface.

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After cytokinesis what phase do cells enter?

ruslelena [56]

Answer:

After Cytokinesis, the cells return to Interphase

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3 years ago

Complete the following sentences to indicate which gene expression components are found in virus particles. Click on a term and

AleksandrR [38]

Answer:

RNA polymerase is always present in the cell, but sometimes present in viruses.
tRNA is always present in the cell but never present in viruses.
Ribosomes are always present in a cell but never present in viruses.
Genes are always present in the cell, but always present in viruses.

Explanation:

Viruses are acellular microorganisms that do not have a biochemical or gene expression of their own. They hijack the host's gene expression system.
RNA polymerase is the enzymes that forms RNA primers during DNA replication and the mRNA transcript of template DNA during transcription. Therefore, RNA polymerase is always required in cells.
Most viruses lack RNA polymerase except some RNA viruses such as polio viruses that contain an RNA dependent RNA polymerase, an enzyme that synthesizes mRNA from an RNA template.
Viruses lack tRNA and ribosomes as they are not capable of translation on their own.
Unlike the gene expression machinery, all organisms including viruses have a genome. Viruses can have both DNA and RNA genomes.

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How does cladistics help us understand phylogeny?

dmitriy555 [2]

Cladistics is based on the shared characters between organisms and their network of evolutionary relationships.

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3 years ago

Imagine a pond. What term correctly describes the interactions of the organisms that are located in the pond community and the p

earnstyle [38]

Answer:

Yes , it is ecosystem.

Explanation:

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3 years ago

How does a law differ from a theory?

Alona [7]

<h3><u>Law and theory:</u></h3>

A law foretells what occurs whereas a theory proposes why. A theory may never turn into a law; however, the advancement of one regularly triggers advancements on the other.

A decent scientific law is a finely-tuned machine, achieving its assignment splendidly however ignorant of why it fills in just as it does. A decent scientific theory is a wounded, however unbowed, contender who fears defeat if unfit to adapt or over power to the next competitor.

Although unique, science needs both theories and laws to comprehend the entire picture. So, whenever somebody remarks that it's only a theory, challenge them to go nine rounds with the champ and check whether they can do any better.

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3 years ago