Lab 4 – The Cell Answer Key Procedure 4.3 Draw a picture of a single Elodea cell and label all visible structures. See the diagram in your lab manual. Without staining‚ the only structures that should have been clearly visible should have been the cell walls and the green chloroplasts. Is this cell prokaryotic or eukaryotic? ______Eukaryotic_______________________ What evidence do you have to support this claim? The presence of organelles (chloroplasts) and its large size.
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Eukaryotic organelles Margaret Walsh South University Online Eukaryotic organelles Living things have evolved into three categories of closely related organisms‚ called "domains": Archaea‚ Bacteria‚ and Eukaryota. Life as we see it each day — including plants and animals — belongs to the third domain‚ Eukaryota. Eukaryotic
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Test #1 Review: Chapters 1‚ 2‚ & 3 Chapter 1. Describing life and science 1. Which is the correct sequence for levels of biological organization within an organism? • Atom-molecule-organelle-cell-tissue 2. Which is the correct sequence for levels of biological organization occurring beyond the individual? • Population-community-ecosystem-biosphere 3. To be considered a living organism‚ the organism must consist of • one or more cells 4. Which is not a required characteristic of
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COMPARATIVE ANALYSIS OF THE DIFFERENT CELLULAR STRUCTURES CELLULAR STRUCTURES COMPOSITION (Biomolecule) LOCATION (in relation to the cell) NUMBER and DISTRIBUTION PRESENCE/ABSENCE IN ORGANISMS PROCESSES INVOLVED (functions) BODY STRUCTURE/ ORGAN functionally similar to and why? CELL MEMBRANE Glycoprotein Phospholipids Cholesterol Glycolipids Peripheral protein Integral protein Structural Protein Receptor Protein Transport Protein Outer Side of the Cell - Maintains the physical
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Normal tau protein supplies nutrients to the brain’s nerve cells and stabilizes the microtubules that carry messages through healthy neurons. When damaged‚ though‚ the tau protein becomes "tangled" inside nerve cell bodies‚ shutting off the supply of nutrients to the cell. These neurofibrillary tangles collapse the neuron’s transport system
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-dz assignment Diagram Micrograph Structure (noun) Function (verb) Relationship between S/F Nucleus - Nucleus composed of chromatin‚ nucleoplasm‚ a nucleolus‚ and a nuclear envelope - Has large pores (nuclear pores/nuclear envelope) - Nuclear envelope has a double membrane - Diameter of 5 micrometers - spherical shape - controls all cell activity by directing which enzymes are made for specific functions - stores the genetic material of the cell (DNA) - directs
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Present Endoplasmic Reticulum (Smooth and Rough) Present Present Ribosomes Present Present Mitochondria Present Present Plastids Absent Present Golgi Apparatus Present Present Plasma Membrane only cell membrane cell wall and a cell membrane Microtubules/ Microfilaments Present Present Flagella May be found in some cells May be found in some cells Lysosomes Lysosomes occur in cytoplasm. Lysosomes usually not evident. Nucleus Present Present Cilia Present It is very rare Contents: Plant
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UNIT 1 BIOLOGY PROKARYOTIC CELLS EUKARYOTIC CELLS Without a defined nucleus. No nuclear envelope (the genetic material is not separated from the rest of the cell) Clearly differentiated nucleus with a nuclear envelope‚ which protects the genetic material. Without organelles (only ribosomes) Presence of membrane-bound organelles Smaller in size Types: plant and animal ANIMAL CELLS PLANT CELLS Cell walls absent Cell walls made of cellulose Chloroplast never present Chloroplast
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is spaghetti like before mitosis Chromosomes (X-Shape) Chromatid (each individual part of the chromosome) Centromere (middle part of the chromosome) Centriole (involved in cellular division‚ the poles that pull the chromatids) Centrosome (microtubule organization center) 4. Diploid (2n) number Half the diploid is haploid (n) number Humans have 46 chromosomes (diploid) 5. G1‚ S‚ G2‚ I‚ P‚ P‚ M‚ A‚ T‚ Cytokinesis Prophase - Duplicated chromosomes are visible Prometaphase - the kinetochore
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Cell Biology (CP8121) Experiment 2: Observing Mitosis and Meiosis on cell specimens (Formal report) Name: Wong Chung An Class: DMLS/FT/1B/02 Admin number: P1138687 Summary This experiment aims to observe mitosis and meiosis on cell specimens. It involves the modelling of the stages of meiosis and also the staining procedures to identify mitosis in onion root tip. There are two parts to the procedure of the experiment whereby the first is staining and observing mitosis in onion root tips and the
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