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horsena [70]
3 years ago
8

I will give brainliest!!!!

Biology
2 answers:
Natasha2012 [34]3 years ago
7 0

Answer:

The. Answer. Is. B

seropon [69]3 years ago
3 0

Answer:

The answer to this question is B

B Ribosomes

Explanation:

<em>Hope</em><em> </em><em>this</em><em> </em><em>helps</em><em> </em>

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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.

4 0
3 years ago
What is sensorineural?
Tanzania [10]
<span>(of hearing loss) caused by a lesion or disease of the inner ear or the auditory nerve.</span>
8 0
3 years ago
When the pulmonologist discusses the condition in which a series of alveoli in the left lower lobe receive adequate ventilation
Vitek1552 [10]

Answer:

b. Alveolar dead space

Explanation:

Based on the information provided within the question it can be said that the statement that would best indicate that the nurse understands the condition would be "Alveolar dead space". This is because, this is the name of the condition being described by the pulmonologist. It is the sum of the volumes of the alveoli that are ventilated but not perfused due to almost no blood flowing through their pulmonary capillaries.

4 0
3 years ago
Read 2 more answers
N
vichka [17]
<h2>Answer:C Gizzards in bird and teeth in mammals</h2>

Explanation:

I took the test and got 100. Your Welcome

3 0
2 years ago
Read 2 more answers
Hormones or paracrines that inhibit gastric secretion include ________.
const2013 [10]

The correct answer is: D) secretin

Gastric secretion is highly regulated whether its secretion should be increased (when food is eaten) or decresed (as the stomach empties). Secretion is controlled by the nervous system and endocrine system that work together. There are three phases of gastric secretory control:

Cephalic-by the brain

Gastric-by the stomach itself

Intestinal- by the small intestine

All of three can work simultaneously.

Secretin is released by duodenal enteroendocrine cells and it stimulates the pancreas and gall bladder, but also suppresss gastric secretion and motility. Secretion of the secretin is stimulated by the chime and it is the part of intestinal phase.

4 0
3 years ago
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