Answer:
Because DNA molecules are extremely long.
Explanation:
DNA molecule is made up of only four types of nucleotides that are adenine, guanine, cytosine, and thymine. These four types of nucleotide encode all the information necessary for the formation and working of the entire organism because each DNA strand is as long as 2 meter which contains millions of base pairs.
The four nucleotides are arranged in the DNA strand with many different combinations which results in the formation of codons sequence that contains all the information about the cell. This long DNA is compressed several times to fit in the nucleus.
Answer:
b. False
Explanation:
Channel proteins use passive transport, that is, they do not require energy such as ATP for transporting molecules.
The endocrine system help control the body through chemicals
Answer:
They make proteins, They can float free or be connected to endoplasmic reticulum
