Q1. Which level of organization is just below (more microscopic) than organ level?

Background

Topic: Levels of Biological Organization

This question tests your understanding of the hierarchy of biological organization, from atoms up to the biosphere.

Key Terms:

• Organ: A structure composed of two or more tissue types working together.

• Tissue: A group of similar cells performing a specific function.

Step-by-Step Guidance

1. Recall the levels of organization: atom → molecule → cell → tissue → organ → organ system → organism.

2. Identify which level comes immediately before (is more microscopic than) the organ level.

3. Think about what organs are made of, and what is the structural unit just below them.

Try solving on your own before revealing the answer!

Q2. Which level of organization would the kidney be classified?

Background

Topic: Levels of Biological Organization

This question asks you to classify the kidney within the hierarchy of biological organization.

Key Terms:

• Organ: A structure with a specific function, made of multiple tissue types.

• Organ system: A group of organs working together.

Step-by-Step Guidance

1. Consider the function and structure of the kidney.

2. Determine whether the kidney is a single structure or a group of structures.

3. Recall the definition of an organ and organ system.

Try solving on your own before revealing the answer!

Q3. At which level of organization is a community plus the physical environment?

Background

Topic: Ecology and Levels of Organization

This question tests your knowledge of ecological levels, specifically the relationship between living communities and their environment.

Key Terms:

• Community: All populations of different species living in a given area.

• Ecosystem: A community plus its physical (abiotic) environment.

Step-by-Step Guidance

1. Recall the definitions of community and ecosystem.

2. Think about what is added to a community to form the next level.

3. Identify the term for a community plus its physical environment.

Try solving on your own before revealing the answer!

Q4. Which term is used to describe the sum of all chemical reactions?

Background

Topic: Biochemistry

This question is about the term for all chemical reactions occurring in an organism.

Key Terms:

• Metabolism: The sum of all chemical reactions in a cell or organism.

Step-by-Step Guidance

1. Recall the processes that include both breaking down and building up molecules.

2. Think about the term that encompasses all these reactions.

Try solving on your own before revealing the answer!

Q5. The internal environment of an organism that remains constant between physiological boundaries is called _____________________________.

Background

Topic: Homeostasis

This question tests your understanding of how organisms maintain stable internal conditions.

Key Terms:

• Homeostasis: The maintenance of a stable internal environment.

Step-by-Step Guidance

1. Think about the process that keeps internal conditions within certain limits.

2. Recall the term used for this regulation.

Try solving on your own before revealing the answer!

Q6. What is the name of the zone of air, land, and water at the surface of the Earth where living organisms are found?

Background

Topic: Ecology

This question is about the largest level of biological organization on Earth.

Key Terms:

• Biosphere: The zone of life on Earth, including air, land, and water.

Step-by-Step Guidance

1. Recall the term for the global sum of all ecosystems.

2. Think about the level that includes all living things and their environments.

Try solving on your own before revealing the answer!

Q7. Which process transforms solar energy into chemical energy of nutrient molecules?

Background

Topic: Photosynthesis

This question tests your knowledge of how plants and other organisms convert energy.

Key Terms:

• Photosynthesis: The process by which solar energy is converted to chemical energy.

Step-by-Step Guidance

1. Recall the process that occurs in plants, algae, and some bacteria.

2. Think about how sunlight is used to make glucose and other nutrients.

Try solving on your own before revealing the answer!

Q8. What do we call the process by which populations accumulate adaptations over time to become more suited to their environments?

Background

Topic: Evolution

This question is about the mechanism by which populations change over generations.

Key Terms:

• Evolution: The process of change in populations over time.

• Adaptation: A trait that increases fitness in a particular environment.

Step-by-Step Guidance

1. Recall the process that leads to populations becoming better suited to their environment.

2. Think about the accumulation of adaptations over time.

Try solving on your own before revealing the answer!

Q9. What is the name for the discipline of naming and classifying organisms according to certain rules?

Background

Topic: Taxonomy

This question tests your knowledge of biological classification systems.

Key Terms:

• Taxonomy: The science of naming and classifying organisms.

Step-by-Step Guidance

1. Recall the branch of biology concerned with classification.

2. Think about the rules and systems used to name organisms.

Try solving on your own before revealing the answer!

Q10. Which category of classification is just below (less inclusive) than Kingdom?

Background

Topic: Biological Classification

This question is about the hierarchy of taxonomic categories.

Key Terms:

• Kingdom: One of the broadest taxonomic categories.

• Phylum: The category below kingdom.

Step-by-Step Guidance

1. Recall the order of taxonomic ranks: Domain → Kingdom → Phylum → Class → Order → Family → Genus → Species.

2. Identify which category comes directly after kingdom.

Try solving on your own before revealing the answer!

Q11. Which category of classification is just above (more inclusive) than species?

Background

Topic: Biological Classification

This question tests your knowledge of taxonomic hierarchy.

Key Terms:

• Species: The most specific taxonomic category.

• Genus: The category above species.

Step-by-Step Guidance

1. Recall the sequence of taxonomic ranks.

2. Identify which category is immediately above species.

Try solving on your own before revealing the answer!

Q12. Which domain includes organisms with a membrane-bound nucleus?

Background

Topic: Domains of Life

This question is about the three domains: Bacteria, Archaea, and Eukarya.

Key Terms:

• Eukarya: Domain with membrane-bound nucleus.

• Prokaryotes: Domains without a nucleus (Bacteria and Archaea).

Step-by-Step Guidance

1. Recall which domain includes organisms with complex cells.

2. Think about the difference between prokaryotic and eukaryotic cells.

Try solving on your own before revealing the answer!

Q13. Which domain includes organisms capable of living in extreme environments?

Background

Topic: Domains of Life

This question is about extremophiles and their classification.

Key Terms:

• Archaea: Domain of organisms living in extreme environments.

Step-by-Step Guidance

1. Recall which domain includes extremophiles.

2. Think about environments like hot springs, salt lakes, and deep-sea vents.

Try solving on your own before revealing the answer!

Q14. What do we call the phenomenon whereby water molecules cling to each other due to hydrogen bonding?

Background

Topic: Properties of Water

This question is about the unique properties of water molecules.

Key Terms:

• Cohesion: Water molecules sticking to each other.

• Hydrogen bonding: The force responsible for cohesion.

Step-by-Step Guidance

1. Recall the property that allows water to form droplets and surface tension.

2. Think about the term for water molecules sticking together.

Try solving on your own before revealing the answer!

Q15. What do we call a molecule tending to lower the hydrogen ion concentration in a solution and raise the pH numerically?

Background

Topic: Acids and Bases

This question is about the properties of bases and their effect on pH.

Key Terms:

• Base: A molecule that decreases hydrogen ion concentration and increases pH.

• pH: A measure of hydrogen ion concentration.

Step-by-Step Guidance

1. Recall the effect of bases on hydrogen ion concentration.

2. Think about the term for substances that raise pH.

Try solving on your own before revealing the answer!

Q16. What is the pH of water?

Background

Topic: Acids and Bases

This question is about the pH scale and the value for pure water.

Key Terms:

• pH: A scale from 0 to 14 measuring acidity/basicity.

• Neutral: pH value where hydrogen and hydroxide ions are equal.

Step-by-Step Guidance

1. Recall the pH value for a neutral solution.

2. Think about the pH of pure water at 25°C.

Try solving on your own before revealing the answer!

Q17. What is the maximum number of other elements carbon can bind to?

Background

Topic: Chemical Bonding

This question is about the bonding capacity of carbon atoms.

Key Terms:

• Valence electrons: Electrons available for bonding.

• Carbon: Element with 4 valence electrons.

Step-by-Step Guidance

1. Recall the number of valence electrons in carbon.

2. Think about how many covalent bonds carbon can form.

Try solving on your own before revealing the answer!

Q18. How many covalent bonds are formed between a diatomic oxygen molecule?

Background

Topic: Chemical Bonding

This question is about the bonding in O2 molecules.

Key Terms:

• Covalent bond: A bond formed by sharing electrons.

• Diatomic oxygen (O2): Two oxygen atoms bonded together.

Step-by-Step Guidance

1. Recall the electron configuration of oxygen.

2. Determine how many pairs of electrons are shared between two oxygen atoms.

3. Think about the type of bond (single, double, triple) in O2.

Try solving on your own before revealing the answer!

Q19. How many pairs of electrons are shared in a diatomic hydrogen molecule?

Background

Topic: Chemical Bonding

This question is about the bonding in H2 molecules.

Key Terms:

• Covalent bond: Sharing of electron pairs.

• Diatomic hydrogen (H2): Two hydrogen atoms bonded together.

Step-by-Step Guidance

1. Recall the electron configuration of hydrogen.

2. Determine how many electrons each hydrogen atom needs to fill its shell.

3. Think about how many pairs are shared in H2.

Try solving on your own before revealing the answer!

Q20. What is the functional group O-H called?

Background

Topic: Organic Chemistry

This question is about functional groups in organic molecules.

Key Terms:

• Hydroxyl group: The O-H functional group.

Step-by-Step Guidance

1. Recall the names of common functional groups.

2. Identify the group consisting of an oxygen and hydrogen atom.

Try solving on your own before revealing the answer!

Q21. What is the functional group NH2 called?

Background

Topic: Organic Chemistry

This question is about functional groups in organic molecules.

Key Terms:

• Amino group: The NH2 functional group.

Step-by-Step Guidance

1. Recall the names of common functional groups.

2. Identify the group consisting of a nitrogen atom bonded to two hydrogens.

Try solving on your own before revealing the answer!

Q22. Which functional group would be found in nucleic acids?

Background

Topic: Organic Chemistry

This question is about the structure of nucleic acids.

Key Terms:

• Phosphate group: Functional group found in nucleic acids.

Step-by-Step Guidance

1. Recall the basic structure of DNA and RNA.

2. Identify the functional group that links nucleotides together.

Try solving on your own before revealing the answer!

Q23. Which type of molecule does not interact with water because it is nonpolar?

Background

Topic: Properties of Molecules

This question is about hydrophobic and hydrophilic molecules.

Key Terms:

• Hydrophobic: Nonpolar molecules that do not interact with water.

• Lipids: Example of hydrophobic molecules.

Step-by-Step Guidance

1. Recall the difference between polar and nonpolar molecules.

2. Think about which molecules are insoluble in water.

Try solving on your own before revealing the answer!

Q24. What do we call the unit of heredity existing as alleles on the chromosomes?

Background

Topic: Genetics

This question is about the basic unit of heredity.

Key Terms:

• Gene: Unit of heredity.

• Allele: Variant form of a gene.

Step-by-Step Guidance

1. Recall the structure of chromosomes and what is inherited.

2. Think about the term for a segment of DNA coding for a trait.

Try solving on your own before revealing the answer!

Q25. How many different amino acids are there?

Background

Topic: Biochemistry

This question is about the building blocks of proteins.

Key Terms:

• Amino acids: The monomers of proteins.

Step-by-Step Guidance

1. Recall the number of amino acids coded by the genetic code.

2. Think about the diversity of protein structure.

Try solving on your own before revealing the answer!

Q26. How many different types of nitrogenous bases are there in nucleic acids?

Background

Topic: Nucleic Acids

This question is about the components of DNA and RNA.

Key Terms:

• Nitrogenous bases: The building blocks of nucleic acids.

Step-by-Step Guidance

1. Recall the bases found in DNA and RNA.

2. Count the total number of unique bases across both types of nucleic acids.

Try solving on your own before revealing the answer!

Q27. How many different types of nitrogenous bases are there in DNA?

Background

Topic: Nucleic Acids

This question is about the components of DNA.

Key Terms:

• DNA: Contains four nitrogenous bases.

Step-by-Step Guidance

1. Recall the bases found in DNA.

2. Count the number of unique bases in DNA.

Try solving on your own before revealing the answer!

Q28. How many valence electrons in carbon?

Background

Topic: Atomic Structure

This question is about the electron configuration of carbon.

Key Terms:

• Valence electrons: Electrons in the outer shell.

• Carbon: Element with atomic number 6.

Step-by-Step Guidance

1. Recall the electron configuration of carbon.

2. Determine how many electrons are in the outer shell.

Try solving on your own before revealing the answer!

Q29. How many neutrons are there in hydrogen?

Background

Topic: Atomic Structure

This question is about the composition of hydrogen atoms.

Key Terms:

• Hydrogen: Atomic number 1.

• Neutron: Neutral particle in the nucleus.

Step-by-Step Guidance

1. Recall the atomic structure of hydrogen.

2. Determine the number of neutrons in the most common isotope.

Try solving on your own before revealing the answer!

Q30. How many carbons in glucose?

Background

Topic: Biochemistry

This question is about the structure of glucose.

Key Terms:

• Glucose: A monosaccharide with the formula C6H12O6.

Step-by-Step Guidance

1. Recall the molecular formula for glucose.

2. Identify the number of carbon atoms in the formula.

Try solving on your own before revealing the answer!

Q31. Which major theory of biology states that all organisms are made up of cells, cells are capable of self-reproduction, and cells come only from preexisting cells?

Background

Topic: Cell Theory

This question is about the foundational theory of biology.

Key Terms:

• Cell theory: States all organisms are made of cells, cells reproduce, and come from preexisting cells.

Step-by-Step Guidance

1. Recall the three main points of this theory.

2. Identify the name of the theory.

Try solving on your own before revealing the answer!

Q32. What do we call the contents of a cell between the nucleus (nucleoid region of bacteria) and the plasma membrane?

Background

Topic: Cell Structure

This question is about the internal components of cells.

Key Terms:

• Cytoplasm: The contents between the nucleus and plasma membrane.

Step-by-Step Guidance

1. Recall the term for the cell's internal fluid and organelles.

2. Think about what fills the space between the nucleus and membrane.

Try solving on your own before revealing the answer!

Q33. What do we call a structure consisting of rRNA and proteins in two subunits; site of protein synthesis in the cytoplasm?

Background

Topic: Cell Structure

This question is about the organelle responsible for protein synthesis.

Key Terms:

• Ribosome: Structure made of rRNA and proteins, site of protein synthesis.

Step-by-Step Guidance

1. Recall the organelle involved in translation.

2. Think about the structure made of two subunits.

Try solving on your own before revealing the answer!

Q34. What do we call a long, slender extension used for locomotion by some bacteria, protozoans, and sperm cells?

Background

Topic: Cell Structure

This question is about cellular structures used for movement.

Key Terms:

• Flagellum: Long, slender extension for locomotion.

Step-by-Step Guidance

1. Recall the structures used for movement in cells.

2. Identify the term for a whip-like extension.

Try solving on your own before revealing the answer!

Q35. What do we call a network of fibrils consisting of DNA and associated proteins observed within a nucleus that is not dividing?

Background

Topic: Cell Structure

This question is about the form of genetic material in a non-dividing cell.

Key Terms:

• Chromatin: DNA and proteins in a non-dividing nucleus.

Step-by-Step Guidance

1. Recall the form of DNA in the nucleus when the cell is not dividing.

2. Identify the term for the diffuse network of DNA and proteins.

Try solving on your own before revealing the answer!