Question 1

Which of the following is NOT one of the five fundamental characteristics of life as described in the study materials?

Accepted Answer

Ability to move independently

Question 2

A scientist discovers a new organism that is composed of multiple cells, each with a nucleus and membrane-bound organelles. According to the Cell Theory, which statement is most accurate about this organism?

Accepted Answer

All cells in the organism arise from pre-existing cells.

Question 3

Which chemical property of water is primarily responsible for its ability to dissolve ionic compounds such as NaCl?

Accepted Answer

Water's polarity and ability to form hydrogen bonds

Question 4

Which of the following best describes an exergonic reaction?

Accepted Answer

A reaction where the products have lower potential energy than the reactants ($$\Delta G \u003c 0)$$

Question 5

Which of the following statements about DNA is correct?

Accepted Answer

DNA stores genetic information in the sequence of its nitrogenous bases.

Question 6

A mutation changes the codon UUU in mRNA to UUC. Both codons code for phenylalanine. What is the best description of this mutation?

Accepted Answer

It is a silent mutation because it does not change the amino acid sequence.

Question 7

Which of the following is a correct statement about the structure of an atom?

Accepted Answer

Protons and neutrons are found in the nucleus, while electrons orbit the nucleus.

Question 8

Which of the following best explains why ice floats on water?

Accepted Answer

Ice is less dense than liquid water due to hydrogen bonds forming a lattice structure.

Question 9

A researcher adds a drop of oil to a beaker of water. The oil forms a separate layer on top of the water. Which property of the oil molecules explains this behavior?

Accepted Answer

Oil molecules are nonpolar and hydrophobic.

Question 10

Which of the following is a major element found in living matter and is essential for the formation of organic molecules?

Accepted Answer

Carbon (C)

Question 11

Which of the following best describes the difference between covalent and ionic bonds?

Accepted Answer

Covalent bonds involve the sharing of electrons, while ionic bonds involve the transfer of electrons.

Question 12

Which property of water allows it to moderate Earth's climate by absorbing and releasing heat with only slight temperature changes?

Accepted Answer

High specific heat capacity

Question 13

Which of the following is a correct statement about the process of evolution by natural selection?

Accepted Answer

Individuals with traits that increase survival and reproduction are more likely to pass those traits to the next generation.

Question 14

Which of the following best describes a hypothesis in the context of scientific inquiry?

Accepted Answer

A testable statement that explains a phenomenon or answers a scientific question.

Question 15

Which of the following is true about spontaneous reactions?

Accepted Answer

They occur without a significant input of energy and have a negative Gibbs Free Energy ($$\Delta G \u003c 0).$$

Question 16

Which of the following statements about prokaryotic and eukaryotic cells is correct?

Accepted Answer

Eukaryotic cells contain membrane-bound organelles, while prokaryotic cells do not.

Question 17

Which of the following is a function of RNA in cells?

Accepted Answer

RNA acts as a messenger carrying instructions from DNA for controlling the synthesis of proteins.

Question 18

Which of the following best explains why water is an effective solvent for many biological molecules?

Accepted Answer

Water's polarity allows it to interact with and dissolve both ionic and polar substances.

Question 19

Which of the following is a correct statement about the role of enzymes in biological reactions?

Accepted Answer

Enzymes lower the activation energy required for a reaction to occur.

Question 20

A student mixes salt (NaCl) in water and observes that the salt dissolves completely. Which property of water is most responsible for this observation?

Accepted Answer

Water's polarity and ability to form hydration shells around ions

General Biology: Fundamental Concepts and Chemical Foundations

Guida di studio - Domande di pratica

Study guide - Flashcard