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emmainna [20.7K]
1 year ago
11

Tryptophan is an amino acid necessary for E. coli survival and growth. E. coli contain genes coding for enzymes that synthesize

tryptophan. These genes are grouped together on a segment of DNA called the tryptophan (trp) operon. Cells can use these enzymes to synthesize tryptophan when it is not present in the environment. owever, when tryptophan is already present in the environment, cellular resources are shifted away from manufacturing the enzymes for tryptophan synthesis. Tryptophan binds with and activates the trp repressor, which then binds to the trp promoter and blocks RNA polymerase. Blocking RNA polymerase decreases the normal transcription rate of the operon. What type of regulation does the trp operon exhibit?a. positive regulation b. protein modification c. negative regulation d. translational regulation
Biology
1 answer:
Setler79 [48]1 year ago
6 0

Answer:

The correct answer is - The tryptophan operon shows C. negative regulation.

Explanation:

Tryptophan is an amino acid, excessively synthesized by the organism, it regulates its transcription through “trp Operon.” In this operon, the corepressor of the tryptophan binds to the repressor protein and gets activated.

This activated repressor now binds to the operator site, and prevents the binding of RNA polymerase enzyme and inhibits the protein synthesis.

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1 year ago
A 21-year-old college student wishes to participate in the ""double red"" program at the local blood center by donating red bloo
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Answer:

Her minimum height must be 5'5" and her minimum weight must be 150 lb

Explanation:

The double red program is a program where red blood cells are donated by people . This red blood cells are used for treatment of patients that require red blood cells such as transplant of organs, transplant of tissues, treatment of cancer e.t.c.

Apheresis is a process whereby blood is collected or removed from the body and it undergoes the process of filtration into various components of the blood.

The machine that is used during apheresis collects the human blood and separates it into white blood cells, red blood cells and platelets.

8 0
1 year ago
Ground squirrels are found in many areas of the United States. They live in underground burrows and are often attacked by birds
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The population of the ground squirrels will be limited by the population of the hawks. The population of the hawks, thus, will be a limiting factor for the population of the ground squirrels. The Hawks are the birds of prey that feeds on squirrels. With the increased number of hawks in the same area as them will put these squirrels in danger. The population of the tree squirrels, however, will have no affect on the population of the ground squirrels. The genetic variability and breeding season are not limiting factors for their population either.

Hence, the correct answer is 'option B - a population of hawks'.

4 0
1 year ago
Read 2 more answers
In a nucleotide, the nitrogenous base is attached to the sugar's _____ carbon and the phosphate group is attached to the sugar's
LUCKY_DIMON [66]

Answer:

A. 1' ... 5'

Explanation:

The pentose sugars present in nucleotides have five-carbon structures. Other components of a nucleotide are a phosphate group and a nitrogenous base. The nitrogenous base in a nucleotide can be a purine or pyrimidine. The purine bases are covalently joined to the 1' carbon atom of the pentose sugar at their N-9. The bond between the nitrogenous base and a pentose sugar is called the N-beta glycosyl bond.

Similarly, N-1 of a pyrimidine base is covalently linked to the 1' carbon of the pentose sugar. The phosphate group of a nucleotide is bonded to the 5' carbon of the pentose sugar.

8 0
1 year ago
You were able to radioactively tag and thereby trace an amino acid that is used to make insulin, a hormone that will be exported
Mnenie [13.5K]

Answer:

B) rough ER → Golgi complex → Golgi vesicle → extracellular fluid

Explanation:

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  • The Golgi complex secrete it in golgi vesicles to cytoplasm.
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2 years ago
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