Bio module 1

    Master this deck with 43 terms through effective study methods.

    Generated from text input

    Created by @ttttyo

    What is a prokaryote?

    Lacks a nucleus and membrane-bound organelles.

    What is a eukaryote?

    Contains a true nucleus and membrane-bound organelles.

    Where is a prokaryote's DNA found?

    In the cytoplasm, within the nucleoid region.

    What is a plasmid?

    Carries extra genes, such as those for antibiotic resistance.

    What happens to SA:V ratio as a cell gets bigger?

    It decreases, affecting material exchange efficiency.

    Why do cells stay small?

    To maintain an efficient surface area to volume ratio.

    Resolution of a light microscope?

    Approximately 200 nm, allowing viewing of living cells.

    Resolution of a TEM?

    About 0.1 nm, providing internal detail of fixed samples.

    Resolution of a SEM?

    Ranges from 1 to 10 nm, showing 3D surface details.

    Difference between magnification and resolution?

    Magnification enlarges images; resolution distinguishes close points.

    Magnification formula?

    Image size divided by actual size.

    Function of the mitochondria?

    Produces ATP through cellular respiration.

    Function of the chloroplast?

    Conducts photosynthesis in plants and algae.

    Function of rough ER?

    Processes and folds proteins from ribosomes.

    Function of the Golgi apparatus?

    Modifies and packages proteins and lipids.

    What three structures are unique to plant cells?

    Cell wall, chloroplasts, and large central vacuole.

    Why is the membrane called 'fluid'?

    Components can move laterally within the bilayer.

    Why is the membrane called a 'mosaic'?

    Proteins are irregularly distributed throughout.

    What makes a phospholipid amphipathic?

    It has a hydrophilic head and hydrophobic tails.

    Role of cholesterol in the membrane?

    Regulates membrane fluidity.

    Role of glycoproteins in the membrane?

    Facilitates cell-to-cell recognition.

    Define diffusion

    Movement of particles from high to low concentration.

    Define osmosis

    Water movement across a selectively permeable membrane.

    What happens to an animal cell in a hypertonic solution?

    It shrinks due to water loss.

    What happens to a plant cell in a hypotonic solution?

    It becomes turgid and firm.

    What is plasmolysis?

    Separation of the cell membrane from the cell wall.

    What does active transport require?

    Energy in the form of ATP.

    What is phagocytosis?

    Uptake of solid particles by a cell.

    What is pinocytosis?

    Uptake of liquids by a cell.

    What is exocytosis?

    Release of substances from a cell via vesicles.

    What three things affect how fast material crosses a membrane?

    SA:V ratio, concentration gradient steepness, and material properties.

    What energy source do autotrophs use?

    Light energy for photosynthesis.

    What energy source do heterotrophs use?

    Chemical energy from consumed organic molecules.

    What three things does every cell need?

    Energy, matter, and waste removal.

    Word equation for photosynthesis?

    Carbon dioxide and water convert to glucose and oxygen.

    Word equation for cell respiration?

    Glucose and oxygen produce carbon dioxide, water, and ATP.

    Where does photosynthesis occur?

    In the chloroplasts of plant cells.

    Where does cell respiration occur?

    In the mitochondria of cells.

    What do enzymes do?

    Lower activation energy to accelerate reactions.

    Lock and key vs induced fit model?

    Lock and key fits exactly; induced fit adjusts to fit.

    What happens to an enzyme past its optimum temperature?

    It denatures and loses functionality.

    What happens to reaction rate once enzymes are saturated with substrate?

    Rate levels off; additional substrate has no effect.

    What is activation energy?

    Minimum energy required to initiate a chemical reaction.