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Unit 1- Cells
23-24 Unit 1- Cells Part 2
Question | Answer |
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Prokaryotic | An organism whose cells do not have an enclosed nucleus, such as bacteria. |
Eukaryotic | A cell characterized by the presence of a nucleus and other membrane-bound organelles. Eukaryotes can be unicellular (protists) or multicellular (fungi, plants and animals). |
Organelles | A tiny cell structures that carries out a specific function within the cell |
DNA | Deoxyribonucleic Acid (DNA) is a self-replicating material present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information. |
Reproduction | The process of producing offspring |
Sexual Reproduction | A reproductive process that involves two parents that combine their genetic material to produce a new organism, which differs from both parents |
Asexual Reproduction | A reproductive process that involves only one parent and produces offspring that are identical to the parent. |
Autotroph | An organism that makes its own food from simple inorganic substances such as carbon dioxide |
Heterotroph | Organism that obtains energy from the foods it consumes; also classified as a consumer |
Photosynthesis | Process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugars and starches |
Cell | Basic unit of life |
Function | the job a cell performs, determined by its structure |
Homeostasis | A tendency to maintain a balanced or constant internal state; the regulation of any aspect of body chemistry, such as blood glucose, around a particular level |
Metabolism | The combination of chemical reactions through which an organism builds up or breaks down materials |
Structure | the shape a cell/organelle has |
Cell Wall | A rigid structure that surrounds the cell membrane and provides support to the cell |
Cell Membrane | Thin and flexible semipermeable membrane around a cell that regulates what enters and leaves the cell |
Chloroplast | An organelle found in plant and algae cells where photosynthesis occurs |
Cytoplasm | A jellylike fluid inside the cell in which the organelles are suspended |
Mitochondrion | An organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. |
Vacuole | Cell organelle that stores materials such as water, salts, proteins, and carbohydrate |
Lysosome | cell organelle that contains digestive enzymes |
osmosis | the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell's partially permeable membrane. |
diffusion | the passive movement of molecules or particles from an area of higher concentration to an area of lower concentration. |
Active transport | the process of moving molecules across a cellular membrane through the use of cellular energy. |
passive transport | a naturally-occurring phenomenon and does not require the cell to exert any of its energy to accomplish the movement. |
selective permeability | ability to differentiate between different types of molecules, only allowing some molecules through while blocking others. |
carbohydrate | an organic compound such as sugar or starch, and is used to store energy. |
lipid | fatty compounds that perform a variety of functions in your body. |
Amino acids | small molecules that are the building blocks of proteins. |
Enzyme | proteins that help speed up metabolism, or the chemical reactions in our bodies. |
mitosis | a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth |
meitosis | process where a single cell divides twice to produce four cells containing half the original amount of genetic information |
Nucleus | The part of the cell containing DNA and RNA and responsible for cell growth and reproduction |
Reactants | Input; the items that go into a chemical reaction. |
Products | Output; the items that come out of a chemical reaction. |
chlorophyll | Natural compound present in green plants that gives them their color. It helps plants to absorb energy from the sun as they undergo the process of photosynthesis |