Plastids • Photosynthesize or store materials • Found only in plants and certain protists. • A familiar plastid is the chloroplast which contains the green pigment chlorophyll and is the site of photosynthesis • Light is converted to energy of chemical bonds‚ provides food for the plant and for other organisms. • Chloroplasts have a double membrane like mitochondria. o Chloroplasts contain membrane structures that look like stacks of pancakes – called grana. o The circular stacks that make up grana
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surface membrane to press against the cell wall (pressure helps to support plant). Sometimes it functions as a lysosome. A primary cell wall containing cellulose. This makes the plant a more uniform and gives a regular shape. Plastids such as chloroplasts that contain chlorophyll‚ the pigment that gives plants their green color and allows them to perform photosynthesis. Specialized cell-to-cell communication pathways known as plasmodesmata‚[3] pores in the primary cell wall through which the plasmalemma
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prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts‚ the cell wall‚ and the structure of chromosomal DNA. In this lab four cells were observed and they were Onion Epidermis Cell stained with Iodine‚ Elodea Freshwater Plant Cell‚ Epithelial Cells aka Human Cheek cells stained with Crystal Violet‚ and Unknown Cell. The difference between animal and plants cells is that animal cells does not have a cell wall or chloroplasts but plant cells do. Animal cells are round and irregular in
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the mitochondrion. | B) | takes place in all animal cells. | C) | does not require O2. | D) | requires lactic acid. | E) | prevents glycolysis. | 2. | In the cell‚ the site of oxygen utilization is the - D | A) | nucleus. | B) | chloroplast. | C) | endoplasmic reticulum. | D) | mitochondrion. | E) | cytosol. | 3. | Animals inhale air containing oxygen and exhale air with less oxygen and more carbon dioxide. After inhalation‚ the oxygen missing from the air will mostly be
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just like ribosomes make proteins. Mitochondria are the powerhouses of the cells‚ and they use sugar and fatty acids to generate energy‚ much like generators in factories use electricity to power the factory. Chloroplasts in plant cells are a lot like the cafeteria in a factory. Chloroplasts help plant cells make food‚ much like cafeterias make food for the workers of a factory. In my marshmallow factory‚ there are two conveyor belts. The first represents the endoplasmic reticulum‚ because it
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floating plants • Have either air spaces trapped in their roots or large air spaces (aerenchyma) to help them float to obtain sunlight • Have hair on their leaves to trap air • Structural adaptation Duckweed‚ water cabbage • Chloroplast found on the top surface of the leaves • Upper Surface has a thick‚ waxy cuticle to repel water and help to keep the stomata open and clear • Structural adaptation • Small and light [pic] Water lily • Structural material to
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molecules to synthesize NADPH and ATP. Plants use this light energy to produce glucose from carbon dioxide. The glucose is stored mainly in the form of starch granules‚ in the chloroplasts of cells. Glucose in the form of starch is non-polar and is not soluble in water‚ allowing it to be stored much more compactly. The chloroplast is formed from an outer membrane‚ an inner membrane‚ and an intermembrane compartment. The aqueous environment within the inner membrane is called the stroma. Within the stroma
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collects in the plant cell vacuole and pushes out against the cell wall. This turgor pressure is responsible for the crispness of fresh vegetables. Chloroplast (plant cells only): Chloroplasts are specialized organelles found in all higher plant cells. These organelles contain the plant cell’s chlorophyll responsible for the plant’s green color. Chloroplasts have a double outer membrane. Within the stroma are other membrane structures - the thylakoids. Thylakoids appear in stacks called "grana" (singular
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when released‚ can cause the death of a cell. 10. Identify the following as true or false and briefly justify your answers. a. Plant cells without chloroplasts can capture the energy of sunlight. i. False: Chloroplasts are essential to capture sunlight energy. b. Chloroplasts can be seen through a light microscope. i. True: Chloroplasts are large enough to be seen by a LM. 11. List one location in the human body where cells with cilia are found. a. Trachea. 12. Consider a cell with
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Q1. The drawings show a humming bird and a sun bird feeding. Both of these birds feed on nectar which is a sugary liquid found inside flowers. Use the information from the drawings to answer the following questions. (a) Describe‚ as fully as you can‚ how the humming bird is adapted for feeding on nectar. ..................................................................................................................................... ...............................................
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