Answer:
Membrane proteins can function as enzymes to speed up chemical reactions, act as receptors for specific molecules, or transport materials across the cell membrane. Carbohydrates, or sugars, are sometimes found attached to proteins or lipids on the outside of a cell membrane.
<span>c.more directly
The equator more tilted facing to the Sun, therefore tropical and desert regions are present on the area.</span>
Answer:
a. GC->CG in the protein coding region on a gene. - Base substitution
b. GC->TA in a GAA glutamate codon - Base substitution
c. Loss of three bases GAA for a glutamate codon - Deletion
d. GC->CG in a tRNA gene - Insertion
e. GC->AT in the ribsome binding site of a mRNA - Frameshift mutation
Explanation:
DNA mutation occurs as a result of a change in the gene sequence of the protein being coded by the genes. Several causes of mutation involve radiation, heavy metal exposure, etc. There are different types of gene mutation. These include a deletion where the bases are deleted. Another one is the insertion where a base is inserted into the sequence. This lengthens the base sequence of the gene. Another mutation is the base mutation -this can take place as a result of inversion. Inversion reverses the order of the bases in a sequence like this: normal CGGA → AGGC
These mutations result in disorder e'g Downs syndrome, Puckingtons disease, Cystic fibrosis etc.
Amino acids are the building blocks of proteins. There are 20 of them in existence. For this item, we are to identify the number of different proteins that can be formed.
In the first position in the sequence, we can have 20 amino acids. Then, because one of which was already used for the first position, 19 amino acids can still be written in the second place. This goes on, and the number of proteins can be calculated as follow,
number of proteins = 20 x 19 x 18 x 17 x 16 x 15
number of proteins = 27,907,200
<em>ANSWER: 27, 907, 200 proteins</em>