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Romashka [77]
3 years ago
10

Which of the following statements regarding the genetic material of cells and viruses is true? A. The genes of both viruses and

cells are enclosed within a nucleus. B. Viral genes may be encoded by DNA or RNA, but cellular genes are always encoded by DNA. C. The characteristics of cells are encoded in genes, but viruses do not have their own genes. D. The nucleotides found in cells are different from the nucleotides found in viruses.
Biology
1 answer:
mash [69]3 years ago
7 0

Answer:

Option B. Viral genes may be encoded by DNA or RNA, but cellular genes are always encoded by DNA.

Explanation:

Virus is a unique organism having unique characteristics which act as both living and non living. In cell, it is living while outside the cell it is present in crystalline form. Virus is composed of two genome i. e. DNA or RNA. But cell is composed of only DNA genome. There is no nucleus present in virus. Mitochondria and ribosome are also absent.

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Give three examples of the color changes that can be seen with pH indicators.
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3 0
2 years ago
Cocaine exerts its pleasurable effects on the brain by:
Semenov [28]

It disconnects the brain's dopamine system.

Further explanation

Cocaine

Cocaine is a capably addictive stimulant medication. For a great many years, individuals in South America have bitten and ingested coca leaves which is source of cocaine, for their stimulant effects. In the mid-1900s, refined cocaine was the primary dynamic fixing in numerous tonics and elixirs created to treat a wide assortment of diseases and was even a fixing in the early plans of Coca-Cola. Prior to the advancement of manufactured specialists utilized cocaine for the relief of pain. However, examine has since demonstrated that cocaine is an effectively addictive substance that can change cerebrum structure and capacity whenever utilized over and over.

Functions of cocaine

It shows very quickly effect after a solitary portion and vanish inside a couple of minutes to 60 minutes. Limited quantities of cocaine for the most part make the person feel euphoric, enthusiastic, loquacious, rationally caution, and easily affected to sight, sound, and contact. The medication can likewise briefly diminish the requirement for sustenance and sleep. Some clients find that cocaine encourages them perform straightforward physical and scholarly assignments all the more rapidly, in spite of the fact that others experience the contrary impact.

Effect of cocaine on dopamine

Cocaine particles block the dopamine transporters which shut down the neuron's capacity to take-up the additional dopamine inside the synaptic parted. This outcomes in expanded degrees of the synapse dopamine present in the extracellular spaces among these neurons.

Answer details

Subject: Biology

Level: College

Key words

  • Cocaine
  • Functions of cocaine
  • Effect of cocaine on dopamine

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2 years ago
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A protein containing more than one polypeptide chain exhibits the ________ level of protein structure.
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Hello. You did not present the answer options, which makes it difficult for you to receive a specific answer. However, I will try to help you in the best possible way.

One of the most common evidences that a paramecium is maintaining homeostasis is the pumping of water from the vacuoles present in its body.

The paramecium is a protozoan that lives in aquatic environments, mainly those composed of fresh water. The problem with this environment is that water is able to enter the paramecium organism in large quantities and this can promote the disruption of the organism through lysis of the cell. In this case, homeostasis must act quickly and pump water out of the body, through the cell vacuole.

Homeostasis is a regulatory system of the organism, which must promote the balance of the organism, whenever any external or internal factor tries to harm this balance.

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