Yeasts are single-celled organisms that can grow in aerobic or anaerobic conditions. Explain how and why a yeast population growing in an aerobic environment would be affected if the environment suddenly became an anaerobic one. In your discussion, address energy, growth rate, and gene expression.
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Yeasts are single-celled organisms that can grow in aerobic or anaerobic conditions. Explain how and why a yeast population growing in an aerobic environment would be affected if the environment suddenly became an anaerobic one. In your discussion, address energy, growth rate, and gene expression.
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- Each of the following conditions involves a disorder in the function of an organelle or other cell structure. In each case, identify the organelle or structure involved and indicate whether it is likely to be underactive or active. Give brief a brief explanation each. a. A man suddenly felt weak and manifested cyanide poisoning symptoms after ingesting undercooked cassava which contains cyan glycosides. b. A young man learns that he is infertile because his sperm are non-motile. A maize plant is unable to survive due to recessive lethal gene causing albinism. d. An infant is placed on a low phenylalanine diet as his newborn screening results revealed that he inherited phenylketonuria. e. A man develops pleiomorphic liposarcoma (a rare type of cancer) and is told that the cause of the problem is a hard mass of cells in his right inner thigh that rapidly increased in size in a C. matter of two months.Using the concepts of endo- and exo-cytosis explain the origin of the mitochondria. Include a drawingWhen making bread with common yeast, the reaction starts as an aerobic process and then becomes an anaerobic process after the oxygen is spent. A baker has created a new strain of yeast which contains no cytochrome c gene and, thus, no cytochrome c protein. This will affect what the yeast strain can do to obtain energy. Use the passage to answer the question. Since the air bubbles in bread are generated by yeast, how will the spaces in this bread compare to those in a loaf made using normal yeast? A. more bubbles B. differently-shaped bubbles C. smaller bubbles D. bubbles more on the interior of the loaf
- According to the endosymbiotic theory, why did the primitive eukaryotic cell fail to digest the non-photosynthetic prokaryote that later became an energy-producing organelle? Because the engulfed cell provided the host cell with carbon dioxide. Because the host cell was able to survive anaerobic conditions with the engulfed cell alive. Because the engulfed cell allowed the host cell to metabolize glucose. Because the engulfed cell provided the host cell with adenosine triphosphate (ATP).Referencing the image above, you are designing an experiment to determine which food source your yeast utilizes best (flour or glucose). You know that yeast will use the enzyme zymase to digest the substrate to create CO2 via anaerobic respiration and you can capture and measure the CO2 with the balloons. Write hypotheses that you could use to test which food source the yeast prefer. H0: HA:Yeast are unicellular microorganisms that use sugar as a food source to produce energy for growth. Yeast cells can convert sugar to energy in the presence or absence of oxygen. When in the absence of oxygen, sugar is broken down into carbon dioxide and alcohol. The sugar molecules cannot pass through the cell membrane directly due to their large size. For the yeast to acquire sugar, the cell must use a transport protein to move the sugar into the cell. Sugar molecules enter the cell with a hydrogen ion. This process continues if there are sugar and hydrogen ions present in the environment. The cell uses the ATPase enzyme shuttle to remove the hydrogen ions from the cell. The image shows this transport process in a yeast cell. Why are active and passive transport both required to move sugar? The active transport process provides the concentration gradient necessary to allow alcohol to help move hydrogen ions into the cell. The active transport process provides the concentration gradient…
- Insulin is a protein that is produced by pancreatic cells and secreted into the bloodstream. Which of the following options correctly lists the order of the structures in the endomembrane system through which insulin passes from its production to its exit from the cell? rough ER, transport vesicles, Golgi apparatus, vacuole, cell membrane rough ER, Golgi apparatus, smooth ER, cell membrane rough ER, transport vesicles, cell membrane rough ER, lysosomes, transport vesicles, cell membraneYou are talking with a winemaker about yeast. "I know that yeast can survive under both aerobic and anaerobic conditions," he says, "but what I don't understand is why they seem to need so much more sugar under anaerobic conditions. I think they gobble a hundred times as much sugar." Can you explain to him why yeast might need more sugar under anaerobic conditions than under aerobic conditions? Is his estimation of a hundred times as much sugar reasonable?The endoplasmic reticulum and Golgi apparatus are both membrane-bound organelles found in eukaryotic cells. Which statement describes one way in which the endoplasmic reticulum and the Golgi apparatus work together? The Golgi apparatus assembles mRNA, and the endoplasmic reticulum translates them into proteins. The endoplasmic reticulum assembles mRNA molecules, and the Golgi apparatus translates them into proteins. The Golgi apparatus assembles proteins, and the endoplasmic reticulum modifies and packages them. The endoplasmic reticulum assembles proteins and the Golgi apparatus modifies and packages them.
- Determine whether the statement is true or false. State the answer directly, no need to explain. 1. Chlorophyll is the solar energy-capturing organelle derived from photosynthetic bacteria. 2. Proteins embedded on the plasma membrane may also transport some molecules to and outside the cell. 3. Nuclear envelope is a double membrane with pores that separates the nucleus from the rest of the cell. 4. Eukaryotic cells are considered the first cell type on Earth and are the cell type of bacteria and archaea. 5. Cell wall surrounds plasma membrane which is common among plants, fungi and many protists. 6. Ribosomes direct the synthesis of RNA. 7. The cytoskeleton is a network of interconnected membranes that helps move substances within the cell.True or False Cell walls are present in the cells of archaea, bacteria, algae, fungi, and plants only. Photosynthetic unicellular prokaryotes such as Oscillatoria exhibit a green color when viewed under a microscope because of the presence of numerous chloroplasts. The nuclear membrane is a double-membrane structure that constitutes the outermost portion of the nucleus and is continuous with the Endoplasmic Reticulum.Course X Edio | Course x Edio | Course x A mitochond x Edio Course X /1089900/lessons/1533965/variants/2428207/take/14/ A * Practice TEXT ANSWER Many different microscopic organisms can be found in pond ecosystems, including the three organisms shown in the diagrams below. The primary cellular structures in each of these single celled organisms are labeled in the diagram. Some of the structures are com- mon to all three organisms and other structures are not. One of the three organisms be- low can obtain energy through photosynthesis. a. Based on the diagrams, identify which organism is able to perform photosynthesis. Explain your reasoning. b. Identify the two reactants for photosynthesis. c. At times, this photosynthetic organism can switch to being heterotrophic. Describe a condition that would favor this organism being heterotrophic. Explain your answer. Answer using 2 to 3 complete sentences for each question. Organism 2 Organism 1 Cytoplasm Chloroplast- Cilia Polysaccharide…