Question 1

Which of the following best describes an emergent property in the biological hierarchy?

Accepted Answer

A property that arises from the arrangement and interaction of parts within a system, not present at the preceding level.

Question 2

Which of the following statements about the scientific method is correct?

Accepted Answer

A hypothesis must be testable and falsifiable.

Question 3

Which of the following is NOT a characteristic of all living things?

Accepted Answer

Photosynthesis

Question 4

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

Accepted Answer

Hydrogen bonds in ice are stable and hold water molecules apart, making ice less dense.

Question 5

A solution with a pH of 5 has how many times more hydrogen ions ($$[H^+]) $$than a solution with a pH of 7?

Accepted Answer

$$100$$ times more

Question 6

Which of the following is true regarding prokaryotic and eukaryotic cells?

Accepted Answer

Only eukaryotic cells have a true nucleus.

Question 7

Which type of chemical bond involves the sharing of electron pairs between atoms?

Accepted Answer

Covalent bond

Question 8

Which of the following best describes the role of DNA in living organisms?

Accepted Answer

DNA encodes instructions for building proteins and is inherited from parents.

Question 9

Which of the following statements about the domains of life is correct?

Accepted Answer

Eukarya includes plants, animals, fungi, and protists.

Question 10

Which of the following is an example of a controlled experiment?

Accepted Answer

Testing the effect of temperature on plant growth by keeping all variables constant except temperature.

Question 11

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

Accepted Answer

Water is polar, allowing it to dissolve other polar and ionic substances.

Question 12

Which of the following is a function of proteins in living organisms?

Accepted Answer

Catalyzing chemical reactions as enzymes

Question 13

Which of the following statements about lipids is correct?

Accepted Answer

Lipids are hydrophobic molecules that do not dissolve in water.

Question 14

Which of the following best describes the function of the sodium-potassium pump in cells?

Accepted Answer

It uses ATP to move sodium out of the cell and potassium into the cell against their concentration gradients.

Question 15

Which of the following is a correct statement about the structure of biological membranes?

Accepted Answer

They are a fluid mosaic of phospholipids and proteins.

Question 16

Which of the following best explains why animals that live in cold environments have a higher concentration of unsaturated fatty acids in their plasma membranes?

Accepted Answer

Unsaturated fatty acids increase membrane fluidity at low temperatures.

Question 17

Which of the following is an example of a polar covalent bond?

Accepted Answer

The bond between oxygen and hydrogen in a water molecule ($$H_2O)$$

Question 18

Which of the following best describes the process of dehydration synthesis?

Accepted Answer

Joining monomers to form polymers by removing a water molecule.

Question 19

Which of the following is a function of the Golgi apparatus in eukaryotic cells?

Accepted Answer

Processing and shipping proteins received from the endoplasmic reticulum

Question 20

Which of the following best explains why Tay-Sachs disease is compared to a strike by trash collectors?

Accepted Answer

It results from the failure of lysosomes to digest cellular waste, leading to accumulation of debris.

General Biology Study Notes: Foundations, Chemistry, Water, Carbon, and Cells

Guida di studio - Domande di pratica

Study guide - Flashcard