Question 1

Which of the following best describes an emergent property in biology?

Accepted Answer

A property that arises only when individual components interact in a system, producing effects greater than the sum of their parts.

Question 2

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

Accepted Answer

Covalent bond

Question 3

A scientist wants to test the effect of a new fertilizer on plant growth. She sets up two groups: one receives the fertilizer, and the other does not. What is the purpose of the group that does not receive fertilizer?

Accepted Answer

It acts as the control group to compare the effect of the fertilizer.

Question 4

Which property of water allows it to dissolve many substances, making it the universal solvent?

Accepted Answer

Its ability to form hydrogen bonds due to its polarity

Question 5

If you have a solution with a pH of 5, what is the concentration of $$[OH^-]$$ ions in the solution? (Recall: $$pH + pOH = 14$$ and $$[OH^-] = 10$$^{-pOH}$$)

Accepted Answer

$$[OH^-] = 10$$^{-9}$$

Question 6

Which of the following is an example of a hydrophobic interaction?

Accepted Answer

Oil separating from water

Question 7

A pharmaceutical company is testing two drugs: S-ibuprofen and R-ibuprofen. Why might one be more effective than the other?

Accepted Answer

They are enantiomers, and only one may fit the target enzyme's active site due to its specific 3D shape.

Question 8

Which of the following best describes a hypothesis in the scientific method?

Accepted Answer

A tentative explanation that can be tested by experiments.

Question 9

How many calories are in 500 grams of water if 1 calorie raises the temperature of 1 gram of water by 1 degree Celsius?

Accepted Answer

500 calories

Question 10

Which of the following is NOT one of the seven properties of life?

Accepted Answer

The ability to photosynthesize

Question 11

Which bond type is responsible for the partial charges in water molecules?

Accepted Answer

Covalent bonds

Question 12

A molecule has the same atoms and bonds as another, but the atoms are arranged differently in space. What is this called?

Accepted Answer

Enantiomer

Question 13

Which of the following is a correct statement about reductionism?

Accepted Answer

It involves breaking down complex systems into simpler components to understand them.

Question 14

Which of the following is an example of an ionic bond?

Accepted Answer

Salt (NaCl)

Question 15

What is the main function of ATP in cells?

Accepted Answer

To provide energy for cellular processes by releasing a phosphate group

Question 16

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

Question 17

A student mixes water and oil in a beaker. After a few minutes, the oil forms a separate layer on top of the water. Which type of interaction is responsible for this observation?

Accepted Answer

Hydrophobic interaction

Question 18

Which of the following is the weakest type of bond or interaction?

Accepted Answer

Van der Waals interaction

Question 19

If the $$[H^+]$$ concentration in a solution is $$1 	imes 10$$^{-8}$$ M, what is the pH of the solution?

Accepted Answer

$$pH = 8$$

Question 20

Which of the following best explains why water has a high specific heat?

Accepted Answer

Water molecules form hydrogen bonds that require more energy to break.

General Biology: Foundations, Chemistry of Life, and Biological Molecules

Guida di studio - Domande di pratica

Study guide - Flashcard