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2 years ago

The Lac Operon is a set of genes that controls the production of lactase the enzyme that digests

Biology

1 answer:

Romashka [77]2 years ago

4 0

Answer:

The lactose present prevents the production of lactase

Explanation:

This question is describing a set of genes in bacteria called LAC OPERON. Lac operon controls the production of lactase, which is the enzyme that digests lactose. However, this gene can be regulated at the transcription level i.e caused to be transcribed or not depending on certain factors.

According to the question, lac operon, which regulates the production of enzymes will be transcribed and subsequently translated i.e. turned on when there is a substrate (lactose) that the produced enzyme will work on. However, when there is no need of the lactase enzyme or there is absence of lactose (substrate), the lac operon gene is turned off.

Note that, the statement that "The presence of lactose prevents the production of lactase" is not correct.

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What is lipid droplets? Why can it be used as a new biofuel?

dimulka [17.4K]

Answer:

Nowadays energy generation heavily relies on fossil fuels causing environmental challenges. The global biofuels supply has increased by a factor of 8% since 2010, but only comprises 4% of the world’s transport fuels in 2015. The development of next generation of biofuel becomes increasingly important due to the depletion of fossil fuels and in the meantime to overcome challenges for current biofuels production – high cost and low efficiency. The biological production of lipid droplets in oleaginous microorganisms like microalgae, yeast, fungi, and bacteria becomes a promising path to the next generation of biofuels.

The lipid droplet (LD) is a cellular organelle that consists of a neutral lipid, mainly of triacylglycerols (TAGs) and cholesteryl esters, cored with a monolayer-phospholipid membrane and associated proteins. Lipid droplets widely exist in both prokaryotic and eukaryotic cells, could be collected and extracted for biofuel manufacturing. However, this technology is now limited in lab research. Methods to improve the lipid droplet production in oleaginous microorganisms, biomass pretreatment, lipid droplet extraction, industrial scalability are still under development. The experience of liposome manufacturing provides us a solid ground for lipid droplet studies and helps our clients move to a further step of new biofuel development.

Explanation:

https://www.creative-biostructure.com/Lipid-Droplets-Biofuel-Supply-626.htm

3 0

3 years ago

Which of the following is NOT a process that drives the carbon cycle?

stiks02 [169]

"Ammonification" is NOT a process that drives the carbon cycle.

<u>Option: B</u>

<u>Explanation:</u>

The organisms circulate carbon-di-oxide in carbon cycle by going through respiration, decomposition, sedimentation, and photosynthesis process but not ammonification. Basically the actual source of nitrogen is agricultural, when a plant or animal passes or an animal disperses waste.

In the remains, bacteria or fungi turn the organic nitrogen back into ammonium, a cycle called ammonisation or mineralisation. Then the micro-organisms generate metabolically required energy from organic nitrogen oxidation into ammonium. Ammonium is then essential for assimilation and absorption into amino acids or for use in other metabolic applications.

8 0

3 years ago

Read 2 more answers

The flow of energy into and out of a system is called

Anvisha [2.4K]

Answer:

When energy flows out of a system, it must all flow into the surroundings.

When energy flows out of a system, ΔEsystem is negative.

When energy flows into the surroundings, ΔEsurroundings is positive.

Therefore,

─ ΔEsystem= ΔEsurroundings

3 0

2 years ago

A client has undergone a left hemicolectomy for bowel cancer. Which activities prevent the occurrence of postoperative pneumonia

Hunter-Best [27]

The measurable activities like Coughing, breathing deeply, frequent repositioning, and using an incentive spirometer are for preventing postoperative pneumonia. Hence, Option C is correct.

<h3></h3><h3>What is postoperative pneumonia?</h3>

Pneumonia is caused by Streptococcus pneumoniae and Haemophilus influenzae leads to infection of the alveoli of lungs.

This type of pneumonia is a rare medical condition happens after local anesthesia has been given to a patient.

The primary causes are the amount of anesthesia given, poor handling of chemicals, the type of anesthesia given to the patient.

To prevent the occurrence of postoperative pneumonia are medicating the patient and use of incentive spirometer. Hence, Option C is correct.

Learn more about pneumonia, here:

brainly.com/question/15159868

#SPJ4

Your question was incomplete, so the probable question was

A client has undergone a left hemicolectomy for bowel cancer. Which activities prevent the occurrence of postoperative pneumonia in this client?

A. Administering oxygen, coughing, breathing deeply, and maintaining bed rest

B. Coughing, breathing deeply, maintaining bed rest, and using anincentive spirometer

C. Coughing, breathing deeply, frequent repositioning, and using anincentive spirometer

D. Administering pain medications, frequent repositioning, andlimiting fluid intake

8 0

1 year ago

The evolution of organisms that use oxygen in their respiration was possible only because of the action of a group of bacteria t

iren2701 [21]

Photosynthetic bacteria changed the Earth's atmosphere

8 0

3 years ago