問題一覧
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the series of events that take place in a cell to duplication of DNA and division of cytoplasm and organelles.
CELL CYCLE
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Growth – Checks – Division
CYCLIC EVENTS
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- Cell Growth - Nutrient Accumulation - DNA Replication - Transition – Translation - Checks Quality control DNA
INTERPHASE
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- Cellular Content Duplication Except: Chromosomes - Growth - mRNA Synthesis - Translation Protein Synthesis - Checkpoint
G1
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-DNA Replication (Chromosomes Duplication)
SYNTHESIS/ S PHASE
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- Cell Grows - Prepares itself for Mitosis - Checks - Checkpoint
G2
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Chromatin Condenses into Chromosomes
Prophase
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Chromosomes line up along metaphase Plate
Metaphase
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Chromosomes break a centromere Sister Chromatids move to opposite ends of the cell Checkpoint
Anaphase
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Nuclear membrane reforms nucleoli reappear Chromosomes Unwind Into chromatin
Telophase
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Cell divide completely CHECKPOINT
Cytokinesis
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Prevents mutant cells from replicating and causing cancer Detect DNA damage Repair cells or go to apoptosis(cell suicide)
Checkpoint
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for growth prepares for s phase
G1 (restriction)
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- for growth prepares for m phase - mismatch repair
G2
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- prevents progression
Inhibit cell cycle
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- a positive feedback loop
Stimulate
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- prepares for anaphase
Metaphase checkpoint (spindle)
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- type of cell that produces gametes (sperm cells and and egg cells) - begin with diploid cell
Meioses
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-has two haploid cell
Meiosis I
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-chromatin contains two uncoiled spread-out sets of chromosomes - condenses into chromosomes
Prophase I
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- pairing of homologous chromosomes
Synapsis
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- 4 sister chromatids paired homologous chromosomes
Tetrad
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- inherited from parents and different versions of the same gene on each chromosome
Alleles
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- chromatids from each homologous chromosome exchange segments of alleles
Crossing over(recombination)
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- Homologous chromosomes line up along the equator
Metaphase I
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- spindle fiber separates homologous chromosomes in each tetrad
Anaphase I
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-one chromosome in each homologous pair at separate poles consists sister chromatids no longer identical
Telophase I
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- four haploid gametes
Meiosis II
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- Nuclear membrane disappears
Prophase II
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- line up along the equator
Metaphase
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Sister chromatids separate
Anaphase II
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- spindle fiber disappears
Telophase II
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- fuel to do an activity - big and heavy molecule - energy carrier of cells - chemical compound used to store and release energy
ATP (ADENINE SUGAR RIBOSE TRIPHOSPHATE)
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- chemical breakdown due to reaction in water
HYDROLYSIS
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- energy comes from earning nutrients - has enormous amount of energy - hampered or slow in delivering energy
OXYGEN (AEROBIC)
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- energy comes from chemical reaction - capable of regenerating ATP at high rates - limited amount of ATP can be released
NO OXYGEN (ANAEROBIC)
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- not ideal for moderate to higher intensity - process is slow in giving energy - more efficient in creating ATP
FAT ATP
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- twice faster in burning ATP - provides a quarter of ATP - synthesize ATP more faster
GLUCOSE/GLYCOGEN
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-muscle can synthesis enough using fat
LOWER INTENSITIES
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- will switch energy from fat to glucose/glycogen
HIGHER INTENSITIES
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1. ATP is broken down into ADP by an enzyme called ATPase. ATP molecule removes a phosphate to release energy 2. It will result into ADP molecule leaving 2 phosphate group. 3. ATP is rebuild from ADP by an enzyme called ATPSynthase. ADP adds phosphate to store energy results in ATP molecule.
CYCLE process
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net release of free energy and is spontaneous Gives off energy More free energy in the reactant than the product ¬-ΔG
EXERGONIC REACTION
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Absorbs free energy from its surroundings and is nonspontaneous +ΔG Requires energy in order to proceed
ENDERGONIC REACTION