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rodikova [14]
2 years ago
12

Which of the following is true of the bones of the forearm?

Biology
1 answer:
Elza [17]2 years ago
8 0

Answer: b. The radius forms the point of the elbow

c. The radius articulates to the wrist closest to the thumb

Explanation:

Ulna and radius are the two bones of the forearm. These bones articulates with the humerus and carpels of the hand.

b. The radius forms the point of the elbow: The elbow joint is the hinge joint that forms between the proximal ends of the radius and ulna in the forearm and distal ends of the humerus. The radius forms a pointed end.

c. The radius articulates to the wrist closest to the thumb: The wrist forms a complex joint. It forms a transition between the hand and the forearm. The radial deviation in the wrist forms the basis for the movement of the tilting of the wrist joint towards the thumb.

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What are histones, and how are they arranged in nucleosomes? Drag the terms on the left to the appropriate blanks on the right t
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Answer:

1) c. five

2) a. lysine and arginine

3) g. two

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Explanation:

A nucleotide can be defined as an organic molecule which forms the building block of nucleic acid such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).

Basically, nucleotide comprises of the following parts;

1. Nitrogenous base: this includes adenine (A), thymine (T), guanine (G), and cytosine (C) which are mainly found in the DNA while adenine (A), guanine (G), uracil (U) and cytosine (C) are found in the RNA.

2. A phosphate group.

3. A penrose sugar: it is either deoxyribose in DNA or ribose in RNA.

The two parts or chemical components of a nucleotide which do not change throughout the structure of DNA are;

I. Five-Carbon Sugar also known as deoxyribose and it has hydrogen on its second carbon.

II. Phosphate: this is the structural backbone that provides support to DNA.

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Histones include five main classes of relatively small basic proteins containing relatively large amounts of lysine and arginine. Nucleosomes are made of two each of four types of histones.

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Define Nucleosynthesis and describe what it was like in the first few minutes after the Big Bang
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Explanation:

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