Question 1

Which of the following is NOT considered one of the major characteristics of life?

Accepted Answer

Presence of a nucleus

Question 2

According to the cell theory, which statement is correct?

Accepted Answer

All cells come from pre-existing cells.

Question 3

Which domain of life contains organisms with prokaryotic cell structure?

Accepted Answer

Bacteria

Question 4

Which macromolecule is primarily responsible for carrying genetic information in cells?

Accepted Answer

Nucleic acids

Question 5

A mutation changes one amino acid in a protein. Which level of protein structure is directly affected first?

Accepted Answer

Primary structure

Question 6

Which of the following best describes a chemoautotroph?

Accepted Answer

Uses chemical compounds as an energy source and CO$$_2 as a $$carbon source

Question 7

Which functional group is commonly found in amino acids and is responsible for their acidic properties?

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 8

What is the main reason lipids are considered hydrophobic?

Accepted Answer

They are composed mainly of non-polar hydrocarbon chains

Question 9

Which of the following is a correct sequence of information flow in cells?

Accepted Answer

DNA $$\rightarrow$$ RNA $$\rightarrow$$ Protein

Question 10

Which type of bond is primarily responsible for the secondary structure of proteins?

Accepted Answer

Hydrogen bonds

Question 11

A sickle cell mutation in hemoglobin changes the protein’s shape. Which concept does this illustrate?

Accepted Answer

Shape determines protein function

Question 12

Which of the following is NOT a function of carbohydrates in cells?

Accepted Answer

Catalyzing chemical reactions

Question 13

Which of the following statements about electronegativity is correct?

Accepted Answer

Electronegativity measures how strongly an atom attracts shared electrons

Question 14

Which of the following is true about peptide bonds?

Accepted Answer

They link the amino group of one amino acid to the carboxyl group of another

Question 15

Which of the following best explains why lipids are not considered polymers?

Accepted Answer

Lipids have diverse structures and are not made from repeating units

Question 16

Which of the following cell types contains membrane-bound organelles?

Accepted Answer

Eukaryotic cells

Question 17

Which of the following is a real-world example of a photoautotroph?

Accepted Answer

A green plant

Question 18

Which of the following statements about protein structure is correct?

Accepted Answer

Tertiary structure involves folding due to R group interactions

Question 19

Which of the following is a correct description of ATP’s role in cells?

Accepted Answer

ATP is the major energy currency inside cells

Question 20

Which of the following best describes the unity and diversity of life at the molecular level?

Accepted Answer

All living things use the same macromolecules, but the ways they are assembled create diversity

General Biology: Characteristics of Life, Evolution, and Cell Theory

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