Q: A solution has a pH of 4. What is its hydrogen ion concentration $$[H^+]$$?

$$[H^+] = 1 \times 10$$^{-4}$$ M

Question 1

Which of the following properties is common to all living organisms?

Accepted Answer

Composed of cells

Question 2

Which level of biological organization is immediately above the organ system level?

Accepted Answer

Organism

Question 3

Which statement best describes the concept of emergent properties in biology?

Accepted Answer

Properties that arise from the interaction of simpler parts in a system

Question 4

Which of the following is NOT a major theme in biology?

Accepted Answer

Gravity

Question 5

Darwin’s theory of descent with modification is best supported by which of the following observations?

Accepted Answer

Fossil records show gradual changes in species over time

Question 6

Which of the following best describes a scientific hypothesis?

Accepted Answer

A tentative answer to a well-framed question

Question 7

A scientist wants to test the effect of light intensity on plant growth. Which is the independent variable in this experiment?

Accepted Answer

Light intensity

Question 8

Which of the following statements about atoms is correct?

Accepted Answer

Protons determine the atomic number

Question 9

Which of the following is a radioactive isotope and can be used in medical imaging?

Accepted Answer

Iodine-131

Question 10

What determines the chemical behavior of an atom?

Accepted Answer

The number of electrons in the outermost shell

Question 11

Which type of bond is formed when electrons are shared unequally between two atoms?

Accepted Answer

Polar covalent bond

Question 12

Water has a high specific heat. What does this mean for living organisms?

Accepted Answer

Water resists changes in temperature, helping to stabilize environments

Question 13

Which property of water allows insects to walk on its surface?

Accepted Answer

Surface tension due to hydrogen bonding

Question 14

A solution has a pH of 4. What is its hydrogen ion concentration $$[H^+]$$?

Accepted Answer

$$[H^+] = 1 	imes 10$$^{-4}$$ M

Question 15

Which of the following best describes a buffer in biological systems?

Accepted Answer

A substance that maintains a stable pH by accepting or donating H$$^+$$ ions

Question 16

Why is carbon unparalleled in its ability to form large, complex molecules?

Accepted Answer

It can form up to four covalent bonds with other atoms

Question 17

Which of the following is an example of an organic compound?

Accepted Answer

C$$_6H$_{12}O$_6 ($$glucose)

Question 18

Which functional group is important for energy transfer in cells and is found in ATP?

Accepted Answer

Phosphate group

Question 19

Which type of isomer has the same molecular formula but different spatial arrangement around a double bond?

Accepted Answer

Cis-trans isomer

Question 20

A scientist is comparing the effectiveness of two antibiotics on bacterial growth. She measures the zone of inhibition for each antibiotic. Which type of data is she collecting?

Accepted Answer

Quantitative data

General Biology: Foundations, Chemistry of Life, Water, and Carbon

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