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kvasek [131]
3 years ago
13

Cellular respiration occurs in a series of steps. If pyruvate enters the mitochondrion,

Biology
1 answer:
zubka84 [21]3 years ago
5 0

Answer:8

Explanation:

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The lactose (lac) operon in E. coli is an example of a repressed gene when lactose is not available in a cell. In 3-5 sentences
irakobra [83]

Answer:

Please find the detailed explanation of this statement below

Explanation:

Firstly, a repressed gene is a gene whose expression has been inhibited or repressed. The lac operon in E.coli bacteria is a regulatory unit containing structural genes, a single promoter and operator regions. The promoter is the region where the transcription enzyme (RNA polymerase) binds to in order to transcribe the genes in the lac operon. The structural genes in the lac operon can only be expressed in the presence of lactose sugar.

However, in the absence of lactose, LAC REPRESSOR, which is a transcription factor (protein), prevents the binding of RNA polymerase to the PROMOTER region by binding to the OPERATOR region of the lac operon. This inhibits the expression of the lactose genes in the operon.

Note that, the structural genes in the lac operon (lacZ, lacY, lacA) code for proteins that help break down lactose sugar for energy in the E.coli bacteria. Therefore, a bacteria cell with a repressed lac operon will be unable to degrade lactose sugar.

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3 years ago
Stanley Miller and Harold Urey​
Mandarinka [93]

Answer:

What is the name of this website

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6 0
3 years ago
Which of the following would be classified as concepts in anatomy?
Lera25 [3.4K]

Concepts in anatomy from the given options include:

  • The brain is composed of two hemispheres.
  • Each kidney contains approximately 6-10 pyramids.
  • The muscle on the back of the arm has three heads of origin.
  • Study of form.

<h3>What is anatomy?</h3>

Anatomy is a branch of biology that is concerned with the study of the structure of living organisms and their various parts.

Anatomy studies the position of body structures as well as the position of related structures or organs of the body.

Anatomy also studies how the structure of these body parts relates to their functions.

Therefore, concepts in anatomy from the given options are:

  • The brain is composed of two hemispheres.
  • Each kidney contains approximately 6-10 pyramids.
  • The muscle on the back of the arm has three heads of origin.
  • Study of form.

In conclusion, anatomy deals with structure of body parts of living organisms.

Learn more about anatomy at: brainly.com/question/896286

#SPJ1

3 0
1 year ago
How does differentiation differ in animal and plant cells
andrew-mc [135]

Plant cells have a cell wall, but animals cells do not. Cell walls provide support and give shape to plants. Plant cells have chloroplasts, but animal cells do not. ... Plant cells usually have one or more large vacuole(s), while animal cells have smaller vacuoles, if any are present.

6 0
2 years ago
What would happen in an ecosystem if there were a decrease in the number of decomposers?
gulaghasi [49]
If there where a decrease in the number of decomposers there would be a increase in the number of producers and consumers.
7 0
3 years ago
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