Dehydration synthesis, where water is removed: $$\text{Monomer}_1 + \text{Monomer}_2 \rightarrow \text{Polymer} + H_2O$$

Question 1

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

Accepted Answer

A property that arises only when individual parts interact within a system, such as consciousness in a brain.

Question 2

Which statement correctly distinguishes between a hypothesis and a theory in scientific inquiry?

Accepted Answer

A hypothesis is a testable prediction, while a theory is a comprehensive explanation supported by evidence.

Question 3

Which of the following molecules is most likely to form ionic bonds?

Accepted Answer

A metal and a nonmetal, such as sodium and chlorine.

Question 4

Given the following atomic numbers, which element has the greatest number of protons?

Accepted Answer

Neon (atomic number 10)

Question 5

Water is essential to life due to its unique properties. Which property allows water to moderate Earth's climate?

Accepted Answer

Its high specific heat capacity, given by $$C = \frac{q}{m \Delta T}.$$

Question 6

Which of the following best explains why buffers are important in biological systems?

Accepted Answer

They maintain a stable pH by neutralizing excess acids or bases, as described by $$\mathrm{pH} = -\log_{10}[H^+].$$

Question 7

Which of the following is NOT a biologically important macromolecule?

Accepted Answer

Salt

Question 8

What makes carbon atoms uniquely suited to form the backbone of organic molecules?

Accepted Answer

Carbon can form up to four covalent bonds, allowing for complex structures.

Question 9

A polymer is formed by joining monomers through which type of reaction?

Accepted Answer

Dehydration synthesis, where water is removed: $$	ext{Monomer}_1 + 	ext{Monomer}_2 ightarrow 	ext{Polymer} + H_2O$$

Question 10

Which of the following best describes the difference between DNA and RNA?

Accepted Answer

DNA is double-stranded and contains deoxyribose; RNA is single-stranded and contains ribose.

Question 11

Which of the following is a saturated fat?

Accepted Answer

A fat molecule with no double bonds, resulting in straight chains that pack tightly.

Question 12

Cellulose and starch are both polymers of glucose. What is the main difference between them?

Accepted Answer

Starch has $$\alpha-$$glycosidic linkages, while cellulose has $$\beta-$$glycosidic linkages.

Question 13

Which scenario best illustrates the concept of scientific literacy?

Accepted Answer

Critically evaluating scientific claims and understanding the process of scientific inquiry.

Question 14

Which of the following is an example of a polar molecule?

Accepted Answer

Water ($$H_2O)$$

Question 15

Which of the following best describes the process of denaturation in proteins?

Accepted Answer

Loss of protein structure due to heat or chemicals, resulting in loss of function.

Question 16

Which of the following is a correct application of the periodic table?

Accepted Answer

Elements in the same group have similar chemical properties due to similar valence electron configurations.

Question 17

Which of the following is a function of nucleic acids in living organisms?

Accepted Answer

Storing and transmitting genetic information.

Question 18

A solution has a hydrogen ion concentration of $$1 	imes 10$$^{-5}$$ M. What is its pH?

Accepted Answer

$$\mathrm{pH} = 5$$

Question 19

Which of the following best explains why water is a good solvent for ionic compounds?

Accepted Answer

Water's polarity allows it to surround and separate ions, dissolving them.

Question 20

Which of the following is a real-world example of the application of buffers in medicine?

Accepted Answer

Using buffers to maintain blood pH around 7.4, preventing acidosis or alkalosis.

General Biology Exam 1 Study Guide: Chapters 1–3

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