Question 1

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

Accepted Answer

A property that arises from the arrangement and interaction of parts within a complex system, such as consciousness emerging from neural networks.

Question 2

Which level of biological organization is immediately above 'organ system' in complexity?

Accepted Answer

Organism

Question 3

A scientist discovers a unicellular organism with a nucleus and mitochondria. To which domain does this organism most likely belong?

Accepted Answer

Eukarya

Question 4

Which of the following is a major difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells contain membrane-bound organelles, while prokaryotic cells do not.

Question 5

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

Accepted Answer

Polarity

Question 6

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

Accepted Answer

Ice is less dense than liquid water due to hydrogen bonds forming a crystalline structure.

Question 7

Which of the following is a trace element required in very small amounts by living organisms?

Accepted Answer

Iodine

Question 8

A peptide bond is formed between which two groups of amino acids?

Accepted Answer

The amino group of one amino acid and the carboxyl group of another

Question 9

Which process joins two monosaccharides to form a disaccharide?

Accepted Answer

Dehydration synthesis

Question 10

Which of the following best describes the function of mitochondria in eukaryotic cells?

Accepted Answer

Extracting energy from sugars, fats, and other fuels to produce ATP

Question 11

Which of the following is true about phospholipid bilayers in cell membranes?

Accepted Answer

They have hydrophilic heads facing outward and hydrophobic tails facing inward.

Question 12

Which of the following is a function of the cytoskeleton in eukaryotic cells?

Accepted Answer

Providing structural support and enabling movement of the cell and its organelles

Question 13

Which of the following statements about DNA is correct?

Accepted Answer

DNA stores genetic information and directs growth and development through gene expression.

Question 14

Which of the following best describes the secondary structure of a protein?

Accepted Answer

Local folding of the polypeptide chain into alpha helices and beta sheets stabilized by hydrogen bonds

Question 15

Which of the following is an example of a polysaccharide and its biological function?

Accepted Answer

Cellulose; provides structural support in plant cell walls

Question 16

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

Accepted Answer

Covalent bond

Question 17

Which property of water allows plants to transport water from roots to leaves through narrow tubes?

Accepted Answer

Capillary action

Question 18

Which of the following is a major function of lipids in biological systems?

Accepted Answer

Energy storage and formation of cell membranes

Question 19

Which of the following best explains the endosymbiotic theory for the origin of mitochondria and chloroplasts?

Accepted Answer

Mitochondria and chloroplasts originated from free-living prokaryotes engulfed by ancestral eukaryotic cells.

Question 20

A patient is given penicillin to treat a bacterial infection. Which cellular structure does penicillin primarily target?

Accepted Answer

Peptidoglycan cell wall

General Biology: Foundations, Cell Structure, and Biomolecules

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