AP Biology Mock Test 3

Sharpen your understanding with our free AP Biology practice tests—designed to mirror real exam questions and provide in-depth scoring feedback. Choose from a range of practice exams to test your knowledge and uncover key areas for improvement with detailed performance analysis. Start practicing today to build confidence, reinforce core concepts, and prepare effectively for your AP Biology exam

59:53

Question 1 of 10 10% complete

Which hormone plays a key role in water reabsorption in humans?

Insulin

Aldosterone

Antidiuretic hormone (ADH)

Thyroxine

Which element is considered the backbone of organic molecules?

Oxygen

Hydrogen

Carbon

Nitrogen

Which enzyme breaks down starch into maltose?

Lactase

Amylase

Sucrase

Lipase

Which of the following has the highest glycemic index?

White bread

Brown rice

Apple

Lentils

What type of bond links amino acids in a protein?

Hydrogen bond

Ionic bond

Peptide bond

Covalent bond

Which element is a major component of nucleotides?

Carbon

Sulfur

Phosphorus

Hydrogen

Which of the following elements is primarily involved in the nitrogen cycle?

Oxygen

Phosphorus

Nitrogen

Sulfur

Which type of nucleic acid is responsible for protein synthesis?

DNA

RNA

tRNA

All of the above

Which term describes animals that excrete urea as their primary nitrogenous waste?

Ureotelic

Ammonotelic

Uricotelic

Aquatic

Which sugar is commonly found in milk?

Lactose

Sucrose

Fructose

Glucose

What is a characteristic feature of chloroplasts?

They contain ribosomes

They are involved in respiration

They contain chlorophyll

They have a single membrane

How many hydrogen bonds can a single water molecule form?

How does water's polarity influence its ability to dissolve substances?

Polar substances dissolve easily

Nonpolar substances dissolve easily

All substances dissolve equally

None dissolve

How does hydrogen contribute to cellular processes?

By forming disulfide bonds

By providing energy

By stabilizing proteins

By aiding in water formation

How do freshwater fish primarily maintain their osmotic balance?

By drinking seawater

By producing concentrated urine

By actively absorbing salts

By excreting dilute urine

How does compartmentalization improve metabolic efficiency?

By increasing cell size

By allowing simultaneous reactions

By slowing down reactions

By reducing enzyme activity

How does compartmentalization affect gene expression in eukaryotic cells?

It has no effect

It allows simultaneous transcription and translation

It enables more complex regulation

It decreases regulation capability

How do plants regulate water loss?

Through transpiration

By photosynthesis

By respiration

Through osmosis

“I found floating therein earthly particles, some green streaks, spirally wound serpent-wise...” These words are of

Leeuwenhoek

A. Jenner

Pasteur

Koch

A dog is following the scent of a jackrabbit. Which of the following accurately describes how the dog's brain integrates information for smell?

Chemoreceptors in the brain send impulses for smell in the nasal cavity.

Chemoreceptor cells in the nasal cavity sends impulses to the appropriate area of the brain.

Chemoreceptors on epithelial cells of the tongue send hormones to the appropriate area of the brain.

Receptors originating in the nose send action potentials to the motor regions of the brain.

Antiseptic methods were first introduced by

Lord Lister

Iwanowski

Beijernick

Edward Jenner