1 Which statement about the relationship between an organism's traits and its genes is true?

A.

An organism's genes are a direct result of its inherited traits.

B.

Genes code for proteins that determine an organism's traits.

C.

Traits code for the proteins that determine an organism's genes.

D.

Genes code for the DNA that determines an organism's traits.

2. A mutation occurs in a sequence of DNA. How could the DNA mutation affect the protein produced?

A.

The chromosomes in the protein could be changed.

B.

The protein would cause other proteins to mutate.

C.

The structure of the protein could be changed.

D.

The mutation could change every protein in the cell.

1. B

2. C

(check with your teacher to make sure and explain it to you)

b is the best answer for this question.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.