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Which of Mendel's laws or principles states that gametes carry one allele for each trait?

A. law of segregation

B. independent assortment

C. gene segregation

D. phenotype assortment

Answer Explanation:

Therefore, the Correct Answer is A.

Q #1: Base your answer on the graph and on your knowledge of biology. Which is a true statement about the relationship between pH and enzyme action?

A. All enzymes work best at a neutral pH.

B. Adding more acid does not affect the rate of activity of an enzyme.

C. Enzymes function only in a pH range of 4.0 to 5.5.

D. The activity of an enzyme is affected by pH.

Answer Explanation
Q #2: Lithium has an atomic number of 3 and a mass number of 7. Which of the following is the number of neutrons in a lithium atom?

A. 4

B. 7

C. 12

D. 3

Answer Explanation

The atom is identified by the atomic number in the periodic table. The atomic number is equal to the number of protons and mass number is the sum of the number of protons and neutrons in the nucleus of an atom. Thus, to find how many neutrons are in lithium atom we use the formula below.

Mass number = number of protons + number of neutrons.

Letting n be number of neutrons in the lithium atom, we have

7=3+n

Rearranging the above equation

3+n=7

n=7-3

n=4

Thus, lithium atom has 4 neutrons.
Q #3: Building blocks of proteins Which of the following organic molecules contain both an amine and carboxyl group?

A. Lipids

B. Proteins

C. Cellulose

D. Chitin

Answer Explanation

The basic building block of the protein is ammonia, which comprises of ammino group -NH2 and a carboxyl group, -COOH.

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