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lidiya [134]
3 years ago
11

Which of the following statements is true? Choose one: A. Bacterial species use a limited number of nutrient sources. B. All bac

terial species require the same nutrients for growth. C. Most bacterial species can be cultured in the lab. D. All organisms require carbon as a macronutrient.
Biology
1 answer:
Lubov Fominskaja [6]3 years ago
7 0

Answer:

A. Bacterial species use a limited number of nutrient sources.

Explanation:

    There are two classes of nutrients that are indispensable to bacteria: macronutrients (carbon, oxygen, nitrogen, sulfur, phosphorus and hydrogen) and micronutrients (iron, zinc, manganese, calcium, potassium, sodium, copper, chlorine, cobalt, molybdenum, selenium, magnesium, among many others). But it takes more than the nutrients for them to feed, it takes the metabolism, because it is through it that they transform what they have into food.

    The absorption of nutrients to carry out the metabolism only occurs because there are growth factors (environmental) that influence the development of the bacteria. Some examples of these factors are: light, temperature, pH, oxygen and osmotic pressure. Each organism has an optimal growth temperature, or a favorable pH to successfully carry out its metabolism. This will vary from species to species.

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What is carrying capacity?
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The carrying ability of an ecosystem is the overall growth rate of a biological species that can be supported by that area, provided the available food, habitat, water, and other resources.

Explanation:

A pond populated briefly by ten turtles, for such, would be sustainable for the species' population.

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2 years ago
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The metabolic fate of fatty acids is dependent on two enzymes, carnitine acyltransferase i and acetyl-coa carboxylase. carnitine
zvonat [6]

The correct answer is the last statement.

If the regulatory serine is mutated to alanine, then acetyl-CoA carboxylase will get activated spontaneously and will produce malonyl-CoA. The increased concentrations of malonyl-CoA will obstruct the oxidation of fatty acids by preventing the entry of fatty acids into the mitochondria.

It is because the AMP-activated protein kinase phosphorylates the serine residues of acetyl-CoA carboxylase to inactivate it. If a mutation occurs in such residues, then the AMPL cannot phosphorylate acetyl-CoA carboxylase and this enzyme will get activated spontaneously.

In such a situation, there will be more than sufficient production of malonyl-CoA, which will inhibit the admittance of more fatty acid getting inside the mitochondria; this will indirectly prevent the oxidation of fatty acids.

8 0
3 years ago
A positively charged molecule. This molecule consists of three hydrogen atoms bonded to an oxygen atom. What name is given to th
Romashka [77]

Answer:

The correct answer is d. hydronium ion.

Explanation:

Hydronium ion is a positively charged molecule that has three hydrogen atom bonded with an oxygen atom. Hydronium ion is formed when the water molecule gains an extra H+ ion from somewhere.  

This H+ ion easily form bonds with one of the lone pairs present on the water molecules. H2O is also a polar molecule and has a partially positive charge due to which the extra H+ ions get attracted to the negative pole of water and make hydronium ion. Therefore the correct answer is d.

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3 years ago
Any movement of carbon between carbon reservoirs is called a
IgorLugansk [536]
The answer you are looking is the carbon cycle.
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3 years ago
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