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Final Exam Semester1
Vocabulary for Biology final exam semester 1
| Term | Definition |
|---|---|
| Eukaryote | Complex cell with internal membranes(membrane bound organelles). Includes animal and plant cells. |
| ATP | Molecule responsible for transferring energy from organic compounds such as glucose to power up cellular processes. |
| Passive transport | Transport of molecules from HIGH to LOW concentration of molecules. Examples include Osmosis, diffusion, and facilitated diffusion. |
| Osmosis | A type of passive transport in which water is transported from a HIGH concentration of water molecules to a LOW concentration of water molecules. |
| Diffusion | Simple random movement of molecules from HIGH concentration to LOW concentration. |
| Prokaryote | Simple cell such as bacteria, does not have a nucleus nor any other membrane bound organelles. |
| Facilitated diffusion | A type of passive transport in which molecules are transported from HIGH to LOW concentration by using a carrier protein. |
| Mitochondria | Organelle responsible for breaking glucose to make ATP in a process known as cellular respiration. |
| Enzyme | A protein that speeds up chemical reactions by attaching to a substrate in a site known as the active site. |
| Reaction time | The time it takes for a reaction to occur. If the reaction time is high, then the enzyme is slow, if the reaction time is low then the enzyme is fast. |
| Cell membrane | A semipermeable organelle that allows certain things to go in and certain things to go out in order to maintain homeostasis. Water can cross in and out. |
| Surface projections | Structures outside a virus that allow the virus to attach to a host cell. |
| Membrane bound organelles | Structures inside Eukaryotic cells. Prokaryote cells (bacteria) and viruses do NOT have these type of structures. |
| Virus | An infective agent that is mainly made of genetic material (DNA or RNA), and a capsid. |
| Nucleotide | The monomer (building block) of Nucleic Acids (DNA and RNA). It's made up of a nitrogen base, phosphate, and sugar. |
| Nitrogenous base | The structure in a nucleotide that changes and determines the genetic code. |
| Proteins | Biomolecule in the cell membrane that allows bigger molecules to cross |
| Active transport | Type of transport that requires protein pumps and ATP for molecules to cross from LOW to HIGH concentration. |
| DNA | Molecule that stores information through the order of nitrogen bases. This information is then used to make proteins. |
| Cytosine | Pairs up with Guanine |
| Adenine | Pairs up with Thymine in DNA and with Uracil in RNA. |
| Carbon, Hydrogen, Oxygen, Nitrogen, and Phosphorous | Main elements found in Nucleic acids such as DNA |
| DNA Replication | Where a genetic molecule is copied during synthesis to make two identical copies of the original genetic molecule. |
| Mitosis | Cell division that makes a total of two identical cells from the parental cell. |
| Meiosis | Cell division that makes a total of four different daughter cells to increase genetic variation. |
| Anaphase | Stage in mitosis in which the spindle fibers separate the chromosomes to opposite sides of the cell. |
| Synthesis | Stage of the cell cycle that occurs after G1 and before G2. In this stage the DNA is replicated. |
| Interphase | The cell spends 90% of its time in this phase. It consists of G1, S, and G2. |
| Gene expression | Only specific genes in the cell are transcribed and translated to make specific proteins in a cell. This is how DNA information is show into traits. |
| Differentiation | Stem cells (baby cells) in the body have the exact same DNA and express only specific proteins to make specialized cells such as a heart cell, muscle cell, brain cell. |
| mRNA | molecule that copies the genetic message from the DNA and carries it to the Ribosome. |
| tRNA | molecule that carries the amino acids and matches them by reading the mRNA. |
| Frameshift | Type of gene mutation that involves the deletion or insertion of one nucleotide (base) and shifts the reading frame after the mutation causing in a change of all the amino acids after the mutation. |
| Cancer/tumors | Are formed due to unregulated cell division- faulty checkpoints in the cell cycle. |
| Inherited mutations | Are due to disruptions in the process of meiosis which affect gametes (sex cells) |