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Hoochie [10]
2 years ago
8

1) Bacteria respond to changes in their environments, such as nutrient availability, by regulating their metabolic pathways. Des

cribe two mechanisms that bacteria use in order to adapt to environmental changes. Include in your answer which mechanism is a short-term or long-term adaptation. (Pg. 364, paragraph 3, sentence 2; paragraph 4, sentence 1)
Biology
1 answer:
nasty-shy [4]2 years ago
4 0

Answer:

Examples:

- Short-term adaptation: feedback inhibition

- Long-term adaptation: regulation of gene expression

Explanation:

Feedback inhibition is a mechanism where the product of a chemical reaction is utilized to modulate its own subsequent synthesis. In bacteria, feedback inhibition allows regulating different metabolic pathways in response to environmental conditions by modulating enzyme activity through enzyme reaction products. Moreover, bacteria may also respond to environmental inputs by long-term changes in gene expression. For example, bacteria contain transcription factors activated during stress, which are able to activate the transcription of particular genes into messenger RNAs (mRNAs) that would subsequently be used to generate particular enzymes by the process of translation. These transcription factors may bind to specific DNA motifs in order to promote transcriptional activity, thereby regulating the production of the corresponding enzyme.

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2. Explain what has to happen to join two monosaccharide units into a disaccharide.
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A disaccharide is formed by two monosaccharides through a condensation reaction. The Hydrogen of one of monosaccharide pairs with the hydroxide (OH) of another monosaccharide. Whe this happens H2O is formed The water molecule is then removed leaving the functional groups of the two monosaccharides able to bond with each other.
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Please help me with this problem! I need to fill out the blank areas on the chart. Thank you!
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3 years ago
Solar energy does not warm Earth's surface evenly. For example, during the day, land areas warm up faster than nearby bodies of
Nadya [2.5K]

Explanation:

The uneven warming of the earth surface causes land and sea breeze over the land and water.

Water has a very high specific capacity and it takes more heat to cause a fractional increase in its temperature. During day, the air around water is cold and dense and under high pressure.

The land adjacent to the water, is a better conduct with a low specific heat capacity. When warming of the earth starts by the sun, the air on land heated by heat radiated from the surface. Air on land is warm, less dense and light.

This forces the air on land to move seaward and the cold air from the sea to move land ward and a sea breeze is set up.

At night the reverse is the case. The land loses heat very fast and the air around it is cold and dense. The water body does not lose heat so fast and the air around is warm and lighter. Air from the land replaces that on the surface of water and a land breeze is set up

learn more:

Heat transfer from the sun brainly.com/question/1140127

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6 0
3 years ago
In sickle-cell disease, as a result of a single amino acid change, the mutant hemoglobin tetramers associate with each other and
gogolik [260]

Answer:

The correct answer is - altered primary and quaternary structure; secondary and  tertiary structure may or may not be altered.

Explanation:

a) Primary structure: It is fundamentally the amino acid sequence or arrangments. Every protein has a remarkable amino acid sequence and little change in these sequence modifies the primary structure. On account of sickle cell, the amino corrosive has changed, and henceforth the essential structure of the protein molecule changes.  

b). secondary structure: It is the folding of the primary structure chain, which results from intermolecular and intramolecular hydrogen holding of the amide group. Ex; Alpha helix and beta sheets. In the above case, this may or might not have changed as there is no conclusive method to know this.  

c) Tertiary structure: Most proteins' tertiary structures are mixes of a-helices, b sheets, and circles and turns. Every protein has interesting three-dimensional structure, folded in a particular way now and then known as a domain. For our situation, since it depends on the optional structure, it might have changed.

d) Quaternary structure: It is the relationship of numerous individual protein chains into a solitary protein with various subunits. The subunits arrangment offers to ascend to a steady structure. For our situation, a hemoglobin tetramers partner with one another and gather into large fibers. This has changed the first structure and accordingly we state the quaternary structure has changed.

4 0
2 years ago
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