Question 1

Which of the following elements is NOT among the four most abundant elements in living systems?

Accepted Answer

Sulfur (S)

Question 2

Stanley Miller’s 1953 experiment demonstrated the abiotic synthesis of which type of biomolecule under early Earth conditions?

Accepted Answer

Amino acids

Question 3

Which macromolecule is NOT a true polymer but exists in large complexes?

Accepted Answer

Lipids

Question 4

What is the correct linkage type found in polysaccharides?

Accepted Answer

Glycoside (ether)

Question 5

Which of the following is a distinguishing feature of eukaryotic cells compared to prokaryotic cells?

Accepted Answer

Membrane-bound organelles

Question 6

Which pillar of life describes the ability of an organism to change its genetic program in response to environmental changes at the population level?

Accepted Answer

Improvisation

Question 7

Which biological macromolecule is responsible for storing hereditary information?

Accepted Answer

Nucleic acids

Question 8

What is the monomeric unit of proteins?

Accepted Answer

Amino acid

Question 9

Which of the following ions is essential for the existence of living systems and is involved in nerve impulse transmission?

Accepted Answer

$$Na^{+}$$

Question 10

Which research method revolutionized the determination of protein structure by providing atomic-level detail?

Accepted Answer

X-ray diffraction

Question 11

Which of the following is NOT a function of lipids in living systems?

Accepted Answer

Catalyzing biochemical reactions

Question 12

Which of the following statements about the RNA World hypothesis is correct?

Accepted Answer

RNA can store information and catalyze reactions

Question 13

Which of the following best describes the role of bioinformatics in modern biochemistry?

Accepted Answer

It applies information science to analyze biological data.

Question 14

Which of the following omics fields is concerned with the abundance of gene-specific mRNAs?

Accepted Answer

Transcriptomics

Question 15

A scientist is analyzing the evolutionary relationships among genes in different organisms. Which omics approach is most relevant?

Accepted Answer

Genomics

Question 16

Which of the following is a correct description of compartmentation in living systems?

Accepted Answer

The ability to be separate from the environment via membranes

Question 17

Which of the following is a correct formula for the peptide bond formed between two amino acids?

Accepted Answer

$$\mathrm{COOH} + \mathrm{NH_2$} \rightarrow \mathrm{CONH} + \mathrm{H_2O}$$

Question 18

Which of the following is the correct formula for the phosphodiester linkage in nucleic acids?

Accepted Answer

$$\mathrm{OH} + \mathrm{PO_4$^{3-}} \rightarrow \mathrm{OPO_2O} + \mathrm{H_2O}$$

Question 19

Which of the following best explains why living systems require energy to maintain order?

Accepted Answer

Because maintaining order opposes the natural tendency toward increased entropy

Biochemistry and the Language of Chemistry: Foundations and Key Concepts

Study Guide - Practice Questions