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Final Test Biology
Final Test
| Question | Answer |
|---|---|
| Cell Membrane: | composed of phospholipids and transport proteins; function to move things into and out of the cell. |
| Cellular Transport | :movement of substances across the membrane, two methods Passive transport- requires no energy OR Active transport- requires energy |
| Passive transport | methods: Diffusion, Osmosis, Facilitated Diffusion |
| Diffusion | molecule from high concentration to area low concentration |
| Osmosis | diffusion of water, water & oxygen can cross the cell membrane |
| Facilitated Diffusion | Fusion of larger molecules through a channel protein. |
| Active Transport | 3 types, Molecular Transport, Endocytosis, Exocyosis |
| Molecular Transport: | Minerals require a pump to move them in and out of the cell |
| Endocytosis | Taking In large molecules by the cell. |
| Exocytosis | Removing large particles from the cell stuff the cell. |
| Hypertonic | high outside, H20 moves out |
| Homeostasis | maintaining balance or sameness |
| Isotonic | the same, balanced H20 |
| Contractile Vacuoles: | Freshwater organisms have structures to pump out water |
| Nucleus- | Contains DNA, & DNA contains genes |
| Ribosomes- | Very small & Site of protein synthesis |
| Cytoplasm- | Jelly-like mixture of water, ions, sugars and proteins. & Fills between organelles |
| Mitochondria- | Produces energy for the cell by converting molecules from food into energy the cell can use & perform cellular respiration. |
| Golgi Apparatus- | Modifies, packages, and transports proteins |
| Chloroplasts- | Perform photosynthesis turning energy from the sun into molecules & contain |
| Somatic/Body Cells- | produced by asexual, and produces Diploid cells |
| Diploid: | cells with 2 sets of paired chromosomes (46 chromosomes FULL) |
| Gamete/Sex Cells- | cells used for sexual, and produces Haploid |
| Haploid: | Cells have 1 set of unpaired chromosomes (23 chromosomes HALF) |
| G1- | Growth(Increases size) |
| S- | DNA replication |
| G2- | Growth(prepare for division) |
| M- | Mitosis(nucleus divides) |
| G0 | Cells may stay in __ because its a resting area for them |
| Cell cycle regulators: | signal cell death, stop cell division |
| Checkpoint proteins: | DNA is copied completely or is damaged |
| Cyclins- | Internal and external regulators |
| Internal | allow reproduction proceed until chromosomes are copied |
| External: | Celled growth factors speed up or slow down the cell cycle. |
| Neoplasm: | mass of cells that lost control |
| Tumors | Neoplasm that become Lumps |
| Oncogenes | genes that transform normals cells into tumor cells |
| Cancer | occurs when neoplasm become malignant |
| Malignant | disrupt body tissues |
| Metastasis | Malignant cells break loose and travel elsewhere in the body. |
| Prophase | (chromosomes see able), |
| Metaphase | (line in the middle), |
| Anaphase | (separate from each other), |
| Telophase | (Spindle broken become new nuclei) |
| Homologous pair- | one chromosome from each pair is from each parent. |
| Meiosis | process of creating a gamete(sex cell) & produces 4 not-identical haploid daughter cells |
| Meiosis I | PI, MI, AI, and TI 1 cell divides into 2 cells |
| Meiosis II | PII, MII, AII, and TII, Divides 2 cells into 4 cells |
| Crossing over: | Happens in Prophase I of meiosis, Homologous pair join |
| Independent assortment: | Happens in Metaphase I of Meiosis Homologous pair lines up |
| Energy- | All living things need energy to survive |
| Chloroplasts | Where photosynthesis occurs |
| Thylakoids discs | oval organelle made of stacks |
| Stoma (stomata): | are openings on the leaf, gases are exchanged there. Also space inside the chloroplast |
| Glycolysis: | occurs in Cytoplasm of all cells, breakdown glucose, Produces 2 ATP. |
| Krebs Cycle: | occurs in mitochondria, Pyruvate is broken down, produces 2 ATP, 6 CO2 are produced as a byproduct |
| Electron Transport Chain: | Occurs in mitochondria, Needs O2, Produces 32 ATP, H2O is produced as a byproduct |
| Genetic | study of heredity |
| Heredity | the passing of traits from parents to offspring |
| Allele | |
| Genes | factors that determine your traits |
| Genotype | what genes, letter, ex) TT, Tt, tt |
| Phenotype | what it looks like. ex) Tall or short |
| Dominance | Uppercase letter ex) TT, Tt |
| Recessiveness | lowercase letters ex) tt |
| Co-Dominanace- | two different alleles show up equally in heterozygous. ex) RR + WW = RW |
| lncomplete Dominance- | one allele, fully dominant over the other. ex) RR + WW = RW |
| Polygenic | traits affected by multiple genes |
| Pleiotropy- | one gene controlling many different traits |
| Alternate Phenotype | water fleas, tree frogs due to presence of predators |
| Asexual: | cell formed by one cell dividing into 2 cells, offsprings are identical to parents |
| Sexual: | cell formed by two cell joining to make 1 cell, offspring are unique to parents |
| Autotrophs | (plants): make food from the sun-photosynthesis |
| Heterotophs | (animals) consume food |
| ATP | an energy carrying molecule. Produced by mitochondria, requires glucose & oxygen to make, breaking bonds releases energy. |