Which statement describes all types of matter?A. It is made of carbon, hydrogen, and oxygen.
B. It is composed of organic materials.
C. It takes up space and has mass.
O D. It is made of proteins and carbohydrates,

Unlike humans, whose bones and muscles help them to move, in insects the structure that protects them and also provides them the structure is called an exoskeleton.

Insects are referred to as invertebrates, unlike mammals. This states that insects tend to lack an internal skeleton. Instead of an internal skeleton, the insects possess an exoskeleton that is specifically situated external side of their bodies. The exoskeleton is useful in the following ways:

• Provide protection to the internal organs of the insects by providing them a structure
• Prevents the internal organs from getting dried out
• Gets attached to the muscles of the insects
• Allow the insects to collect information regarding the environment

Thus, we can conclude that the exoskeleton is the insect’s structure that helps in protecting them and further provides them the structure. Hence, the correct answer is option C.

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1. Answer is "it provides all the elements for lipids".

The elements of glucose are carbon, hydrogen and oxygen. Hence, if the molecule glucose were broken down, those elements are released.

The elements of lipids are same as glucose. But sometimes lipids contain sulfur and phosphorous.

In proteins there is nitrogen as element other than carbon, hydrogen and oxygen.

Nucleic acids also have carbon, hydrogen, oxygen, nitrogen and phosphorus as elements.

Hence, glucose molecule cannot provide all the elements for proteins and nucleic acids but can provide elements for most of lipids.

2. Answer is “NO”.  

The four types of macromolecules are carbohydrates, lipids, proteins and nucleic acids. Elements of those macromolecules are as follows.

Carbohydrates - carbon, hydrogen, and oxygen

Lipids - carbon, hydrogen, oxygen sometimes nitrogen and phosphorus.

Proteins - carbon, hydrogen, oxygen and nitrogen sometimes sulfur and selenium.

Nucleic acids - carbon, hydrogen, oxygen, nitrogen and phosphorus.

Sugars are also type of carbohydrates. Hence, sugars can provide only carbon, hydrogen, and oxygen as the elements. Therefore, sugars cannot provide all the elements that needed to make four types of macromolecules. But sugars can provide elements to make carbohydrates and most of lipids.

When NAD+ becomes NADH, it is being reduced.

What is NAD+ and NADH?

NAD+ is a coenzyme that is involved in many metabolic reactions. It is a dinucleotide, meaning that it is made up of two nucleotides. The nucleotides are nicotinamide adenine dinucleotide (NAD) and adenosine diphosphate (ADP).

NAD+ is oxidized when it loses an electron. This leaves the nicotinamide ring with an extra hydrogen atom, which gives NADH its name. NADH is a reduced form of NAD+.

The reduction of NAD+ is a necessary step in many metabolic reactions. For example, NADH is used in glycolysis, the process by which cells break down glucose to produce energy. NADH is also used in the Krebs cycle, the process by which cells break down carbohydrates, proteins, and fats to produce energy.

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NAD+ accepts a hydrogen ion (H+) and two electrons (2e−), as it becomes reduced to NADH + H+. The NADH moves to the electron transport chain and donates a pair of electrons (becomes oxidized) to the first compound in the chain.

Explanation:

it really does depend on what type of 'cell' your talking about. If your talking about a battery type of cells then it's obviouse but I know that there are 3 trillion cells in your body :) reply if this was helpfull