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4 years ago

What is the strongest force on earth?

Biology

2 answers:

Vilka [71]4 years ago

6 0

the strongest force on earth is gravity and the nuclear force

dem82 [27]4 years ago

3 0

Out of these four, the weakest one is gravity and the strongest fundamental force is the strong nuclear force; it is 100 times stronger than the electromagnetic force.

HOPEFULLY THIS HELPS YOU!

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"how many molecules of dna are present in the chromosomes of a single human cell (2n=46) during prophase i of meiosis? (enter th

LiRa [457]

92 chromatids

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4 years ago

What are reasons scientists use models?

vlada-n [284]

Answer:

To study objects that are way too small

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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.

7 0

3 years ago

Which statement describes the proper procedure for identifying an organism by using a dichotomous key?

Zinaida [17]

Explanation:

A dichotomous key is a tool that allows the user to determine the identity of items in the natural world, such as trees, wildflowers, mammals, reptiles, rocks, and fish. Keys consist of a series of choices that lead the user to the correct name of a given item. "Dichotomous" means "divided into two parts".

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3 years ago

All of the following factors are responsible for unloading of oxygen from the hemoglobin molecule except

tatuchka [14]

All of the factors are responsible for unloading of oxygen from the hemoglobin molecule except the increase in partial pressure of oxygen.

Because the affinity of haemoglobin for binding oxygen increases as partial pressure of oxygen rises.

<h3>What is Haemoglobin?</h3>

Red blood cells include the protein hemoglobin, which transports oxygen to your body's organs and tissues and carbon dioxide from those tissues back to your lungs.

<h3>What are factors that affect Haemoglobin's affinity for oxygen?</h3>

When used as an oxygen transporter, hemoglobin can carry about 65 times as much oxygen as simple solution in plasma could.
A cooperative oxygen-hemoglobin affinity is produced by conformational changes in the molecule.
The oxygen-hemoglobin dissociation curve's sigmoidal form reflects this characteristic.
Temperature, hydrogen ions, carbon dioxide, and intraerythrocytic 2,3-DPG all have an impact on hemoglobin's affinity, and they all interact with one another.

Learn more about Haemoglobin here:

brainly.com/question/28135307

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1 year ago