Question 1

Which of the following best describes the Central Dogma of Biology?

Accepted Answer

Information flows from DNA to mRNA to protein, resulting in a physical trait.

Question 2

Which of the following is NOT a characteristic shared by all living organisms?

Accepted Answer

Ability to photosynthesize

Question 3

Louis Pasteur's experiment disproved which widely held belief about the origin of life?

Accepted Answer

Spontaneous generation

Question 4

Which of the following correctly lists the hierarchy of biological organization from smallest to largest?

Accepted Answer

Cell → Tissue → Organ → Organism → Ecosystem

Question 5

A scientist observes that desert ants can return to their nest after foraging. Which hypothesis was tested to explain this behavior?

Accepted Answer

Ants use their stride length and step number to measure distance (pedometer hypothesis).

Question 6

Which of the following statements about scientific theories and hypotheses is correct?

Accepted Answer

A theory is a well-supported explanation, while a hypothesis is a tentative, testable statement.

Question 7

Which domain includes organisms with cells that contain a nucleus?

Accepted Answer

Eukarya

Question 8

Binomial nomenclature assigns each species a two-part scientific name. Which of the following is the correct format?

Accepted Answer

Genus species (e.g., Canis lupus)

Question 9

Which of the following best explains why peer review is important in scientific research?

Accepted Answer

It helps ensure experiments are performed correctly and results are unbiased.

Question 10

A researcher is testing whether a new fertilizer increases plant growth. Which of the following is the best example of a controlled variable in this experiment?

Accepted Answer

Amount of sunlight each plant receives

Question 11

Which of the following is a correct statement of the cell theory?

Accepted Answer

All organisms are composed of cells, and all cells come from pre-existing cells.

Question 12

Which of the following best describes homeostasis in living organisms?

Accepted Answer

The maintenance of a stable internal environment despite external changes.

Question 13

Which of the following is an example of a real-world application of the scientific method?

Accepted Answer

Testing whether a new drug reduces symptoms in patients compared to a placebo.

Question 14

Which of the following is the correct order of taxonomic classification from most inclusive to least inclusive?

Accepted Answer

Domain → Kingdom → Phylum → Class → Order → Family → Genus → Species

Question 15

A mutation occurs in the DNA of a cell. According to the Central Dogma, what is the most likely consequence if this mutation changes the mRNA sequence?

Accepted Answer

The protein produced may have a different amino acid sequence, potentially altering its function.

Question 16

Which of the following best illustrates the concept of heredity?

Accepted Answer

A child inherits eye color from their parents due to the transmission of genetic information.

Question 17

Which of the following is a key difference between Bacteria and Eukarya?

Accepted Answer

Eukarya have membrane-bound nuclei, while Bacteria do not.

Question 18

Which of the following best describes the process of metabolism in living organisms?

Accepted Answer

The sum of all chemical reactions that occur within an organism to maintain life.

Question 19

A student claims that all scientific names are based on an organism's appearance. Which of the following best refutes this claim?

Accepted Answer

Some scientific names, such as Marsilea quadrifolia, are based on features other than appearance or are named after people or places.

Question 20

Which of the following is an example of a testable scientific hypothesis?

Accepted Answer

If plants are given more sunlight, then they will grow taller.

Introduction to the Study of Life: Foundations of Biology

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