Penn Foster Biology – The Cell Practice Test

These questions are part of the practice quiz. Start practicing

• What is facilitated diffusion?
• What defines an element in chemistry?
• What is the octet rule?
• What is the primary function of the endoplasmic reticulum?
• What are isotopes?
• Which structure is found in eukaryotic but not prokaryotic cells?
• What primarily determines an atom's chemical reactivity?
• What is photosynthesis?
• What is the function of ribosomes in a cell?
• What role does chlorophyll play in photosynthesis?
• What type of biomolecule are enzymes classified as?
• What is the plasma membrane's main role?
• During which phase of the cell cycle do chromatids form?
• Which of the following best describes the function of the smooth endoplasmic reticulum?
• Which structure is involved in the breakdown of excess fatty acids and detoxification in cells?
• Which of the following is an example of a polysaccharide?
• What are autotrophs?
• Which of the following is NOT a group of organic molecules?
• What type of molecule primarily provides energy storage in living organisms?
• Which property of water allows it to form bonds with similar molecules?
• In what type of environment do hypertonic solutions cause cells to shrink?
• Which structures are included in the cytoskeleton?
• What is an effect of buffers on biological processes?
• What is the main purpose of the plasma membrane?
• Which particles make up an atom?
• What definition best describes tissue?
• What is the primary function of an organ system?
• Which of the following proteins is involved in muscle contraction?
• What is the primary function of ribosomes?
• Where are centrioles primarily located within a cell?
• What is biodiversity?
• Which of the following is NOT a kingdom in the Domain Eukarya?
• Which type of transport across the cell membrane does not require energy?
• What are prokaryotic organisms primarily composed of?
• What are the subatomic particles that make up an atom?
• Which kingdom is part of the Domain Eukarya?
• What is the role of centrioles in cell division?
• How many other atoms can each carbon atom share electrons with?
• Where is chitin primarily found?
• Which motor protein is primarily responsible for muscle contraction?
• What type of molecule is formed when two monosaccharides bond together?
• In what type of cell structure are ribosomes found?
• Which part of the cell contains the genetic material?
• What organelle is responsible for energy production in plant cells?
• What is the primary concept of evolution?
• What does a population refer to?
• In which part of the cell does glycolysis occur?
• Hydrophobic substances are characterized by what property?
• What does the term "chromatid" refer to?
• How do bases typically behave in solution?
• What structures do eukaryotic cells possess that are typically absent in prokaryotic cells?
• What role does density variation play in aquatic environments?
• What is a key role of the plasma membrane?
• Which component of the cytoskeleton is involved in cell division?
• What is the definition of an H bond in chemistry?
• Which option defines an organ?
• What are the three primary phases in which matter can exist?
• How do biologists generally name organisms?
• What does extinction refer to in biological terms?
• Chloroplasts and mitochondria are bounded by which kind of membrane?
• What is the function of a buffer in biological systems?
• Which of the following is an example of a structural protein?
• What is the function of the vacuole in plant cells?
• What is the primary product of the Calvin cycle?
• What term describes substances that have an affinity for water?
• What phase of the cell cycle involves preparation for DNA replication?
• In which part of a eukaryotic cell does cellular respiration primarily occur?
• Which organelle is involved in the production of ribosomal RNA?
• What is the jelly-like substance that fills the inside of a cell called?
• Where does photosynthesis primarily occur in plant cells?
• What is a defining feature of eukaryotic cells?
• Currently, how many recognized kingdoms are there?
• What is taxonomy?
• Which concept refers to organisms of the same species living together in a given area?
• What is categorized as a neutral pH level?
• Which of the following sugars is found in milk?
• What is the most basic source of energy for living things?
• What term describes a modification that enhances an organism's fitness for its environment?
• During which phase of mitosis do chromosomes align at the cell's equator?
• In biological terms, which of the following is the smallest unit of structure and function?
• Where is the bacterial chromosome located?
• Which level of biological organization is a group of similar cells that perform a specific function?
• Which of the following is NOT a property of life that supports organismal existence?
• What structure in a prokaryotic cell is responsible for maintaining its shape?
• Which of the following carbohydrates is a true monosaccharide?
• What is cytoplasm?
• Which of the following is a disaccharide?
• What characteristic describes myosin?
• What is the main characteristic that distinguishes rough endoplasmic reticulum from smooth endoplasmic reticulum?
• What is the primary function of mitochondria?
• What process do cells use to release energy without oxygen?
• What are the primary products of the citric acid cycle?
• What characteristic distinguishes living things from non-living things?
• What does the structure of the cell wall provide?
• Which structure is directly involved in the synthesis of lipids?
• What role do lipids play in biological systems?
• What defines heterotrophs in the biological context?
• What is the main component of the cell membrane?
• Which of the following families of organic molecules is primarily involved in storage and energy release?
• What are protists?
• Why is binomial naming significant in biology?
• When is a molecule considered a compound?
• What process converts glucose into pyruvate?
• Which carbohydrate is primarily responsible for providing energy in the human diet?
• What type of carbohydrate is chitin classified as?
• Which organelle is often referred to as the powerhouse of the cell?
• What field of study focuses on compounds that contain carbon?
• Disaccharides are composed of how many monosaccharides?
• Which of the following is characteristic of complex carbohydrates?
• Which two areas of biology assist in grouping organisms into categories?
• What is Fibrin primarily associated with?
• Why is carbon often referred to as the "key to life"?
• What is an ecosystem comprised of?
• What are lipids primarily composed of?
• Which of the following are the two main types of cells?
• What process involves the movement of water across a semi-permeable membrane?
• What is the primary function of enzymes in biological systems?
• What does the biosphere encompass?
• Which of the following are the three main classes of carbohydrates?
• What is the function of lysosomes?
• Which of the following best describes lipids?
• What is the term for the programmed cell death process?
• What is the simplest form of carbohydrate?
• What are the main stages of the cell cycle?
• What does the Domain Bacteria consist of?
• Which sugar is produced through photosynthesis in plants?
• What type of cells are known for being more complex and having membrane-bound organelles?
• What is the correct order of classification categories from least to most inclusive?
• What is the primary role of the plasma membrane?
• In what structure is DNA found in eukaryotic cells?
• What is homeostasis?
• What is the basic unit of life?
• What are monosaccharides?
• What is a cell known as in biological terms?
• Which part of the cell is responsible for maintaining cell shape and structure?
• What defines a substance that is alkaline?
• What are the major motor proteins in a cell?
• What do you call the semi-permeable barrier that controls molecular movement into and out of the cell?
• What is a key difference between plant and animal cells related to energy production?
• Where is cellulose predominantly found?
• What does the inner membrane of the mitochondria enclose?
• Which term describes any living thing?
• What is the composition of the outer membrane of mitochondria?
• When does a covalent bond occur?
• What is sucrose commonly known as?
• What are valence electrons?
• What is inductive reasoning?
• What components make up the endomembrane system?
• How is a molecule defined in biology?
• In which part of animals does glycogen primarily store energy?
• What is binomial naming?
• What pH range is identified as alkaline?
• Why is high heat capacity important for living organisms?
• How many elements occur naturally?
• Why are carbohydrates essential for cellular function?
• What structure selectively allows substances to pass into and out of the cell?
• How are polysaccharides primarily characterized?
• What is determined by the functional group of an organic molecule?
• Which characteristic is NOT found in prokaryotic cells?
• In which part of the cell does protein synthesis occur?
• What is the main purpose of the cellular respiration process?
• What molecule serves as the carrier of genetic instructions?
• The Golgi apparatus is part of which cellular system?
• Which description fits a community in biological terms?
• How does water typically dissolve nonionic substances, such as glucose?
• Where can keratin be found in humans?
• What is the process by which cells take in substances via vesicles called?
• Why is the surface area to volume ratio significant in cells?
• What is an atom in scientific terms?
• What is a group of atoms bonded together called?
• What type of cell division produces two identical daughter cells?
• Where do prokaryotic cells store their genetic material?
• What type of environment is combined with a community to form an ecosystem?
• What is an atomic number?
• What stage of cell division is characterized by the separation of sister chromatids?
• What are the two main stages of photosynthesis?
• What do all cells have that encloses their cytoplasm and genetic material?
• What does natural selection refer to in biological terms?
• What are the two basic components of a hydrocarbon skeleton?
• Which part of the cell contains the genetic material?
• What distinguishes exocytosis from endocytosis?
• What is meant by cellular differentiation?
• What role do signaling molecules play in cells?
• Which sequence correctly lists the levels of biological organization from smallest to largest?
• Which of the following correctly illustrates the concept of solvency in biology?
• What is a phospholipid bilayer?
• The function of the smooth endoplasmic reticulum is primarily determined by what?
• What role do microtubules play in a cell?
• What is the primary role of the carbon backbone in organic molecules?
• Which of the following is an example of a monosaccharide?
• What structure provides support and shape to plant cells?
• What is the most inclusive level of classification?
• Which of the following is NOT a domain of life?
• Which organelle is responsible for protein modification and sorting?
• Which of the following is considered the smallest unit of life?
• What happens to the pH in the presence of an acid?
• What pH range is considered acidic?
• Which of the following proteins is known as a hormone?
• What do we call the network of protein filaments that helps maintain the cell's shape?
• Which type of cell lacks a nucleus?
• What does the capsule of a bacterial cell do?
• What organelle is primarily responsible for detoxifying harmful substances in the cell?
• What is systematics?
• What type of transport moves substances down their concentration gradient?
• What defines hydrocarbons?
• What does bioethics focus on?
• Which of the following is NOT a characteristic of acids?
• Where can prokaryotic organisms typically be found?
• What can be considered "the medium of life"?
• What are bases or alkaline solutions characterized by?
• Carbohydrates consist of which elements in a specific ratio?
• Where are phospholipids primarily found within a cell?
• Why are mitochondria often referred to as the powerhouse of the cell?
• Which is not a function of lipids?
• What is the primary difference between glycogen and cellulose?
• What is the primary function of a flagellum?
• Compounds and molecules contain which types of chemical bonds?
• What are prokaryotes?
• What do cells primarily use for energy?
• What are three main uses of lipids in cells?
• How is energy defined in biological terms?
• Which component of the cell is primarily responsible for packaging and distribution of proteins?
• How do lipids contribute to structural support in cells?
• What term describes the energy currency of the cell?
• What is the function of proteins embedded in the cell membrane?
• Which of the following is true about disaccharides?
• What role does ATP synthase play in cellular respiration?
• What are microtubules composed of?
• What does the term "semipermeable" refer to in cellular contexts?
• A monosaccharide has a carbon backbone composed of how many carbon atoms?
• What is the primary waste product of cellular respiration?
• What structure surrounds the inner membrane of mitochondria?
• What role does the Golgi apparatus play in the cell?
• How is matter best defined?
• What is formed when different tissues work together?
• What function do actin and myosin proteins serve?
• What are saccules?
• How do monosaccharides generally differ from each other?
• What molecule is produced as a waste product of photosynthesis?
• What do prokaryotic organisms lack compared to eukaryotes?
• Which of the following is a type of cell that lacks a membrane-bounded nucleus?
• What structure is responsible for controlling the movement of substances into and out of a cell?
• What type of organisms primarily inhabit extreme environments within Domain Archaea?
• What are adaptations in biological terms?
• What kind of transport requires energy to move substances across a cell membrane?