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2 years ago

What is chemosynthesis?

1 answer:

5 0

the synthesis of organic compounds by bacteria or other living organisms using energy derived from reactions involving inorganic chemicals, typically in the absence of sunlight.

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Why are vaccines useful

natita [175]

Answer:

A vaccine activates our immune system without making us sick. Many dangerous infectious diseases can be prevented in this simple and uncostful

drug .Vaccines have eliminated some of the most dangerous, fatal diseases in human history.

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3 years ago

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5.) What is the process by which the egg is released called?

borishaifa [10]

Answer:

5.) What is the process by which the egg is released called?

A.) Ovulation

6.) When does ovulation occur?

A.) Ovulation typically occurs about 14 days before the start of the next menstrual period.

<u>-TheUnknownScientist</u>

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3 years ago

What will happen to a population of organisms that are in an oxygen rich environment. (Double click the story board to draw on i

Dmitry_Shevchenko [17]

Answer:

it will disolve

Explanation:

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2 years ago

which statement describes what most likely occurs when I Compass is placed next to a simple circuit made from Battery, a light b

Arte-miy333 [17]

I believe the statement would be that, A magnetic field created by the electric current causes the compass needle to move.
An electric current through a conductor creates a magnetic field,such that when a charged particle such as an electron, proton, or ion is in motion, magnetic lines of force rotate around the particle. Since current moving through the wire consists of electrons in motion, there is a magnetic field around the wire, which causes the compass needle to deflect.

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3 years ago

1. Suppose the synthesis of an amino acid was accomplished by four enzymes encoded by four genes that formed an operon. Draw a m

vivado [14]

I have attached lac operon model having 4 genes. See attachment for better understanding.

Answer:

The Lac operon is controlled by two signals.

Initiation

Glucose and lactose concentrations control the initiation of transcription of the Lac operon through their effects on the Lac repressor protein and Cap.

Lactose absent (Repression)

When lactose is absent, the Lac repressor binds the Lac operator and shuts off expression of the operon.

Lactose present (Transcription)

Addition of lactose increases the intracellular concentration of a related compound, allolactose. allolactose binds to the Lac repressor, causing it to undergo a conformational change that releases its grip on the operator DNa.

Glucose absent (Repression)

When glucose is absent, cyclic aMp (red triangle) is produced by the cell and Cap binds to DNA.

Glucose present (Transcription)

LacZ, the first gene of the operon, encodes the enzyme b-galactosidase, which breaks down lactose to galactose and glucose.

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3 years ago