II PUC – CHEMISTRY (34) MODEL QUESTION PAPER - 1 Time: 3hours 15 minutes Maximum marks: 70 Instructions: 1. The question paper has four parts: A‚ B‚ C and D. All parts are compulsory. 2. Write balanced chemical equations and draw labeled diagrams wherever required. 3. Use log tables and the simple calculator if necessary. (Use of scientific calculators is not allowed) PART-A I. Answer ALL of the following. (Each question carries 1 mark) 10x1=10 (Answer each question in one word or
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Nonspecific Defenses (passive immunity) TRUE OR FALSE? _____ 1. The skin is the single most important defense the body has. _____ 2. Sneezing removes pathogens from your nose. _____ 3. Sweat‚ mucus‚ tears‚ and saliva are all types of mechanical barriers used to protect you. _____ 4. The inflammatory response is part of the body’s first line of defense. _____ 5. Leukocytes are white blood cells that fight infections and get rid of debris. _____ 6. Barriers that keep out pathogens are the
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Cell Division‚ Heredity‚ and Rcolution Practice Questions Cell Division An organism is heterozygous at two gene loci on different chromosomes. Explain how these alleles are transmitted by the process of mitosis to daughter cells. After mitosis the parent cell’s genome is dividedninto two daughter cells. In most eukaryotes‚ the nuclear envelope that separates the DNA from the cytoplasm disassembles. The chromosomes align themselves in a line spanning the cell. As the cell elongates‚ corresponding
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kidney‚ thus the heart delivers and helps maintain nutrient and waste composition throughout the body. The heart‚ like all muscle cells‚ releases ionic calcium when stimulated which binds to troponin which in turn causes tropomyosin to uncover the myosin-actin binding sites on the muscle. Temperature has effects on the metabolism and activity of all cells. Warmer temperatures increase the kinetic energy of molecules in cells‚ providing more energy which allows metabolic processes to proceed more
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Bio 93 Review Sheet: 1. Understand all the THEMES presented in the introductory lecture (lec 1). 2. What is an open system? Energy in and out‚ comes in and leaves as heat 3. What are the 4 most important elements in the human body? C‚ O‚ N‚ H 4. Draw the periodic square for Helium. How many valence electrons does it have? How do you figure this out using the periodic table? Two valence e-‚ 23He‚ all the way right full shell only holds two electrons 5. What is an isotope? How are they used
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BIO1130 - Archean Eon Keywords - Shivan Desai Aerobic: Requiring oxygen to survive‚ and perform life functions. (Aerobe-Organisms that require oxygen for cellular respiration.) Aerobic respiration is a characteristic of eukaryotic cells‚ even though prokaryotic cells can use aerobic respiration as well. Helps produce allot of ATP. Example: Kreb’s Cycle. Anaerobic: Doesn’t require oxygen to survive and perform life functions. (Anaerobe-Organisms that don’t require oxygen to live)
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Biology Guide 1. How is the human body organized? A= The levels of organization in the body include cells‚ tissues‚ organs‚ and organ systems. 2. Define cell A= Basic unit of structure and function in living things. 3. Define Tissue A= Group of cells that perform a single function. 4. CHECK OUT TYPES OF TISSUE ON PG. 863 5. What’s the epithelial tissue? A= Tissue that lines the interior and exterior body surfaces. 6. Connective tissue? A= Tissue that provides support
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Cellular Functions CORE TOPIC 1: CELLULAR FUNCTIONS Learning Outcomes: (a) Describe and interpret drawings and photographs of typical animal and plant cells as seen under the electron microscope‚ recognising the following membrane systems and organelles: rough and smooth endoplasmic reticulum‚ Golgi body‚ mitochondria‚ ribosomes‚ lysosomes‚ chloroplasts‚ cell surface membrane‚ nuclear envelope‚ centrioles‚ nucleus and nucleolus. (b) Outline the functions of the membrane systems and organelles
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Culinary Exam Review Contaminants • Chemical o Toxic metals (lead‚ copper‚ brass‚ zinc) o Chemicals (cleaning products‚ polish‚ lubricants‚ sanitizers) o Pesricides • Physical: glass‚ metal‚ nail polish • Biological o Seafood toxins o Plant toxins o Fungal toxins o Pathogens o Bacteria o Parasites o Viruses Pathogens: Microorganisms that cause illnesses (virus‚ bacteria‚ parasites and
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Cardiovascular Anatomy & Physiology I. Structures and Functions Heart Muscle * Has 3 layers (epicardium‚ myocardium‚ and endocardium) and a surrounding sac called the pericardium * Location: In the mediastinum‚ above the diaphragm‚ and is surrounded on both sides by lung * Shape: Resembling triangle‚ with base parallel to the right edge of the sternum Heart Chambers * The right side of the heart is a low pressure system and the left side is a high pressure system
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