BIOLOGY

Which molecule is least soluble in water?

•  A. Glucose

•  B. Sodium chloride

•  C. Oxygen

•  D. Cellulose

Which of the following is a disaccharide?

•  A. Fructose

•  B. Maltose

•  C. Ribose

•  D. Amylopectin

The bond formed between glycerol and a fatty acid is a:

•  A. Glycosidic bond

•  B. Peptide bond

•  C. Ester bond

•  D. Phosphodiester bond

Which statement about saturated fatty acids is correct?

•  A. They contain C=C double bonds

•  B. They increase membrane fluidity

•  C. They have only single C–C bonds

•  D. They are always liquid at room temperature

Which diagram represents the structure of a nucleotide?

•  A. Sugar → Base → Lipid

• B. Phosphate → Sugar → Base

• 
  C. Base → Phosphate → Sugar

•  D. Sugar → Fatty acid → Base

What is the main function of cristae in mitochondria?

•  A. Store genetic material

•  B. Increase surface area for ATP production

•  C. Protect ribosomes

•  D. Transport proteins out of the cell
  

Which structure is found in BOTH plant and animal cells?

•  A. Chloroplast

•  B. Vacuole

•  C. Cellulose cell wall

•  D. Rough ER

Which group includes ONLY prokaryotes?

•  A. Protista

•  B. Archaea

•  C. Fungi

•  D. Plantae

A species is best defined as organisms that:

•  A. Live in the same habitat

•  B. Produce fertile offspring

•  C. Eat the same food

•  D. Have the same color

Why is DNA useful in classification?

•  A. All organisms have identical DNA

•  B. More similar DNA means closer evolutionary relatedness

•  C. DNA changes depending on environment

•  D. Only microorganisms have DNA