increase cell volume. This results in a single nucleus having many copies of a single chromosome (Painter & Reindorp‚ 1940). In this experiment‚ Drosophila melanogaster is reared in specific conditions and its salivary gland extracted to study endomitosis. I hypothesize that I will see endomitosis in the salivary gland chromosome of third instar larval D. melanogaster. My prediction to test my hypothesis is that polytene chromosomes will be formed if endomitosis occurs. Materials
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4 Enzymes and metabolism 4.1 Metabolism (Book 1A‚ p. 4-3) Metabolism (新陳代謝) refers to the (1) _______________ of the chemical reactions that take place in an organism to keep it alive. Catabolism (分解代謝) Anabolism (合成代謝) All the (2) _______________ reactions within an organism (3) _______________ energy All the (4) _______________ reactions within an organism (5) _______________ energy 4.2 Properties and actions of enzymes (Book 1A‚ p. 4-4) A What is the role of enzymes in metabolism?
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Lab 7 – Cellular Respiration Objectives: • To be able to define cellular respiration and fermentation. • To give the overall balanced equations for aerobic respiration and alcoholic fermentation. • To distinguish between inputs‚ products‚ and efficiency of aerobic respiration and those of fermentation. • Understand the relationship between respiration and photosynthesis. Note: You should perform experiments as described in this handout‚ which are adapted from Starr and
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|first bite of a meal. The smell of food triggers the salivary glands in the mouth to secrete | | | |saliva. | |2 |Salivary Gland - Parotid Gland |Saliva is produced in and secreted from salivary glands. T here are three major pairs of salivary | | | |glands: the parotid
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A. Fermentation Lab- The basic process Prepared 3 beakers with contents listed below. ( a. Beaker 1: glucose only b. Beaker 2: Starch only c. Beaker 3: Starch + amylase). Poured contents of each beaker into its respective fermentation tube‚ ensuring the tail portion of the tube was filled with liquid. Placed tubes in an incubator at 37 degrees‚ measuring distance between tip of tube tail to fluid level at 20‚ 40‚ and 60 minute intervals. Calculated gas volume using this distance along with radius
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enzymes can be used over and over again. The substrates fit into the enzyme like a key fits into a lock (3). Enzymes have other functions as well‚ for example enzymes play a big role in your stomach and intestines. Enzymes such as protease‚ lipase‚ and amylase can break up fat‚ oil and starches from our daily food. How Does It Work? Enzymes are proteins‚ which act with a given compound (the substrate) to produce a complex‚ which then forms the products of the reaction.(1) Enzymes
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give rise to precipitation. 6.2ml/20ml *100% = 30.5% 1. From the absorbance readings before and after the precipitation‚ calculate the % recovery of the amylase? Absorbance reading at start = 0.472 abs 33.7% T Absorbance reading after precipitation: Calculate Transmittance of each sample: Transmittance calculations‚
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enzymes‚ chemicals that speed up reactions involved in the breakdown of food. The stomach and the small intestines‚ which are parts of the alimentary canal‚ each produce a digestive juice. Other digestive juices empty into the alimentary canal from the salivary glands‚ gall bladder‚ and pancreas. These organs are also part of the digestive system. Part 1 | | Location of the parts that are in the Digestive System Part 2
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LABORATORY 3: LABORATORY 3: Basic Chemistry for Investigating Living Systems Abstract The purpose of this experiment was to explain how colorimetry can be used to qualitatively detect cellular chemical components; to chemically differentiate between proteins‚ sugars‚ starches‚ and lipids; to identify the roles of molecular components in living systems; to comprehend the value of using a systematic approach to research; and to describe why hypotheses‚ controls‚ standards‚ and quality control
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GI Terminologies Visceral pain; dull poorly localized pain Somatic pain; sharp pain‚ well localized Referred pain; pain experience at a distance from disease process Fetor hepaticus; sweet fecal odor caused by hepatic failure Feculent breath; foul fecal odor caused by severe bowel obstruction Severe halitosis; foul breath odor can be caused by poor dental hygience or neoplasms or esophagus and stomach Jaundice; yellowish discoloration of skin caused by high bilirubin level associated with
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