Question

question 5
how many copies of any particular gene does an individual human have?
a 4
b 1
c 2
d 46
e 23

question 6
1 point
mutations that cause the cell to divide rapidly, even in the absence of a signal to divide, are usually mutations of.
a proto - oncogenes.
b tumor - suppressor genes.
c dna polymerase.
d cell - surface proteins.
e dna - repair enzymes.

Explanation:

Question 5

Humans are diploid organisms. This means that for each gene, they inherit one copy from the mother and one copy from the father. So, an individual human has 2 copies of any particular gene.

Proto - oncogenes are genes that normally help cells grow. When they are mutated, they can become oncogenes. Oncogenes can cause cells to divide rapidly even without the proper signals. Tumor - suppressor genes prevent uncontrolled cell growth. When tumor - suppressor genes are mutated, they lose their ability to regulate cell growth, but this is not the case of cells dividing in the absence of a signal (more about loss of growth control checkpoints). DNA polymerase is involved in DNA replication, cell - surface proteins are for cell - cell communication and other functions, and DNA - repair enzymes fix damaged DNA.

Answer:

C. 2

Question 6