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marissa [1.9K]
4 years ago
15

Which structural organizations are always present in proteins? A- Primary and Secondary B- Secondary and Tertiary C- Tertiary an

d Quaternary D- Primary and Tertiary
Biology
1 answer:
Tom [10]4 years ago
8 0

Answer:

A. Primary and Secondary

Explanation:

This is because these are the two most basic and lowest levels of structural organization in proteins and therefore shared amongst all proteins. Primary structure is simply a chain of amino acids, secondary structure is either an alpha-helix or a beta-pleated (accordion) sheat formed by hydrogen bonds between the backbones of the primary structure protein, tertiary is just a 3d shape formed by the interactions of R groups of the amino acids, and quarternary is still 3d but made up of 1 or more sub 3-d shapes.

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Answer:

"The scientific method describes the processes by which scientists gain knowledge about the world. It's characterized by six key elements: questions, hypotheses, experiments, observations, analyses, and conclusions. These elements are interrelated steps, so they don't always function in the same order."

Explanation:

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4 years ago
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3 years ago
Please answer for me
alekssr [168]
The third choice is the answer.

This is because chemical change occurs when the (for a lack of better wording) interior of the object is changed in the second one the bread is being broken down chemically by the stomach acid this is because the acid is breaking down the formation of the bread dissolving it and chainring it into something else.

In the 4th one the change that is seen is chemical because the formation of the roof is change the physical appearance may be the same (ie. The size & shape) but their are other changes in the color, texture and maybe taste ( don’t taste a rusting roof lol) these are ways in which you can figure out if a change is chemical or physical.

Physical change occurs when the size and/or shape of an object is changed.

Chemical change occurs when the texture, taste and/or color of the object is changed, but-sometimes chemical change cannot be seen.

Hope this helped :)
3 0
3 years ago
A wealthy elderly couple dies together in an accident. A man comes forward, claiming that he is their long lost son and is entit
vodka [1.7K]
The answer is NO

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Answer:

Agree

Explanation:

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