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Zarrin [17]
3 years ago
5

A substance that speeds up the rate of a chemical reaction is called

Biology
1 answer:
maw [93]3 years ago
6 0

Answer:

It is called An enzyme

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Organisms differ in how they obtain energy, and they are classified as autotrophs or heterotrophs based on how they obtain their
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Organisms differ in how they obtain energy, and they are classified as autotrophs or heterotrophs based on how they obtain their energy in an ecosystem. ... organisms that contain chlorophyll absorb energy during photosynthesis and use it to convert the inorganic substance carbon dioxide and water to organic molecules. Why?

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Which of the following is NOT an environmental factor that causes mutations?
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B

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The lac operon can be regulated by two distinct methods. Which of the following statements are correct?The lac operon can be act
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Answer:

  • The lac operon can be activated by the binding of allolactose to the repressor protein, releasing it from DNA and thereby allowing for transcription to occur.
  • In response to low glucose levels, cAMP is upregulated; the binding of cAMP to the cAMP receptor protein triggers the activation of the operon.

Explanation:

Lactose operon or lac operon  (includes lacZ, lacY and lacA genes) is found in some bacteria and the products of its genes are involved in lactose metabolism. So, this operon is active (genes are transcribed) when lactose is present and glucose is absent (or at low level). The operon is regulated by the lac repressor which acts as a lactose sensor and catabolite activator protein (CAP) which acts as a glucose sensor.

When there is lactose (in the form of allolactose) lac repressor detects it and stops being repressor. This enables transcription.

CAP detects glucose (via cAMP) and activates transcription when glucose levels are low.

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The first step of cellular respiration involves
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<span>glucose is broken down into two molecules of pyruvate </span>
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Suppose the brown allele for eye color (B) is completely dominant over the blue
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50%

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