TEAS Science: Biology and Life Science 2

Question 1

Which organelle is the primary site of ATP production in eukaryotic cells?

Accepted Answer

Mitochondrion

Answer

Mitochondria generate most cellular ATP through aerobic respiration.

Question 2

During which phase of mitosis do sister chromatids separate and move to opposite poles?

Accepted Answer

Anaphase

Answer

Sister chromatids are pulled apart toward opposite poles during anaphase.

Question 3

What molecule carries the genetic instructions used to build proteins during translation?

Accepted Answer

mRNA

Answer

Messenger RNA carries the codon sequence read by ribosomes during translation.

Question 4

Which of the following best describes an enzyme's role in a chemical reaction?

Accepted Answer

It lowers activation energy

Answer

Enzymes are catalysts that lower the activation energy needed for a reaction.

Question 5

In a typical food chain, organisms that produce their own food using sunlight are called what?

Accepted Answer

Producers

Answer

Producers, such as plants, make their own food through photosynthesis.

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