Question

1. Proteins consist of:

1. genes.
2. chains of amino acids.
3. RNA plus mRNA.
4. chains of DNA nucleotides.

2. The structure of DNA is a

1. triple helix
2. double helix
3. hoogesteen comlex

3. There are ______ amino acids that humans use.

1. 15
2. 10
3. 20
4. 25

4. RNA differs from DNA in that it uses:

1. Group of answer choices
2. uracil instead of thymine.
3. uracil instead of guanine.
4. guanine instead of uracil.
5. uracil instead of adenine.

Answer 1

Answer-1-

Protein consists of amino acids, and amino acids are the building blocks of protein. There are around 20 amino acids.

The main functions of proteins in the body are to build, strengthen and repair or replace things, such as tissue.

They can be:

• structural, like collagen
• hormonal, like insulin
• carriers, for example, hemoglobin
• enzymes, such as amylase.  

Answer-2-

The structure of DNA is actually in a DOUBLE HELIX arrangement. DOUBLE HELIX means that the two long chains of nucleotides are arranged in a spiral like a twisted ladder.

Answer-3-Body needs 20 different amino acids to grow and function properly. Though all 20 of these are important for your health, only nine amino acids are classified as essential and non essentual amino acids.

Answer-(Uracil instead of thymine)

DNA stands for deoxyribonucleic acid, while RNA stands for ribonucleic acid. DNA, thus, carries a deoxyribose sugar and RNA contains a ribose sugar. DNA and RNA base pairing is slightly different since DNA uses the bases adenine, thymine, cytosine, and guanine; RNA uses adenine, uracil, cytosine, and guanine. Uracil differs from thymine in that it lacks a methyl group on its ring.