of eukaryotic chromosomes. They are all made up of different type of proteins but work together to functions. 2. Describe what is going on in the 5 stages of mitosis. What is a spindle anyway? The Anaphase stage of is happening‚ A spindle is a microtubule structure that brings about chromosomal movement during nuclear division. 3. Compare Meiosis I to Meiosis II. Do they end up with the same exact results? Why or why not? Both Meiosis I and Meiosis II have four steps‚ but in Meiosis II
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Interphase: DNA replicates ( S-phase) Prophase: Nucleolus fades and chromatin (replicated DNA and associated proteins) condenses into chromosomes. Each replicated chromosome comprises two chromatids‚ both with the same genetic information. Microtubules of the cytoskeleton‚ responsible for cell shape‚ motility and attachment to other cells during interphase‚ disassemble Pro Metaphase: - nuclear envelope breaks down- no longer a recognizable nucleus. Mitotic spindle fibers elongate from the centrosomes
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the protons are not equal to the electrons ion the protons are not equal to the neutrons isotope atomic mass = mass of protons + neutrons changing the number of neutrons does not influece the mass or electrons atom behaviour is because of electrons hydrogen almost always loses its electron‚ leaving it a hydrogen ion taking away a negative charge creates a cation adding a negative charge creates an anion electronegativity is the ability to steal electrons electronegativity is influenced
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Biology: Concepts and Connections‚ 6e (Campbell) Test Bank (1) Part (1) Chapter 1 Introduction: The Scientific Study of Life 1) Which of the following statements about the leopard is false? A) Leopards are the largest cat in the genus Panthera. B) Leopards‚ like lions‚ can roar. C) Leopards prefer to eat their kill in trees. D) Leopards are well-adapted for nocturnal hunting. E) Leopards are normally solitary animals. Answer: A Topic: Opening Essay Skill: Factual
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condition often associated with cancer. Mitosis is a demanding process for the cell‚ which goes through dramatic changes in ultrastructure‚ its organelles disintegrate and reform in a matter of hours‚ and chromosomes are jostled constantly by probing microtubules. Occasionally‚ chromosomes may become damaged. An arm of the chromosome may be broken and the fragment lost‚ causing deletion. The fragment may incorrectly reattach to another‚ non-homologous chromosome‚ causing translocation. It may reattach to
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Neurodegenerative Disorders: Alzheimer’s Disease 1. Amyloid Precursor Protein (APP) Alzheimer’s disease (AD) remains a major cause of senile dementia‚ which is characterised by an impairment of neuronal and synaptic function in addition to the accumulation of β-amyloid plaque and formation of neurofibrillary tangles within distinct portions of the brain (De Strooper and Annaert‚ 2000). Progression of this distinct pathology of neurodegeneration does not typically vary from patient to patient
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CHAPT 1 - The scientific method allows the solving of problems and answering of questions. Observations Proposing ideas Testing the ideas Discarding or modifying ideas based on results Hypothesis: proposed explanation for a set of observations Hypotheses needs to be: Testable – it must be possible to examine the hypothesis through observations Falsifiable – it must be able to potentially be proven false Both logical and creative influences are used to develop a hypothesis A hypothesis
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processes but they are also quite different. In both of these dna is replicated before the prophase. The sister chromatids are both separated in anaphase of these processes‚ however in meiosis it is in the anaphase 2 stage. Finally both stages have microtubules to separate chromosomes and both begin in the prophase and end in telophase. There are also several key differences. Mitosis occurs during growth of organism or to repair tissue of the organism. Mitosis ends with two diploid cells which are
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Cell Parts and Functions Table | Cell Organelle | Cell Function | Nucleus | Directs all cell activities "Brain or Control Center of cell" | Nuclear Envelope (Membrane) | Controls what passes in and out of the nucleus | Cytoplasm | Jelly-like substance found inside cell that acts as a medium for chemical reactions within the cell | Golgi Body (Apparatus) | Packages the proteins made by the ribosomes so they can be sent out of the cell. The UPS store of the cell | Mitochondrion | "powerhouse
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Vesicles (hormones‚ neurotransmitters) are packaged in the Golgi and are transported to the surface to release their chemicals. Lysosome are rarely found in the plant cells‚ but are necessary for intracellular digestion. Centrosome are an area where microtubule are produced for cell division. Peroxisomes are membrane-bound packets of oxidative enzymes that help convert fatty acids to sugar and assist chloroplasts in photorespiration. Four big parts within the cell are the vacuole‚ the chloroplast‚ and
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