BIO311C

BIO 311C TEST 2 QUESTIONS AND ANSWERS A+ GRADED Cytoskeleton and three moelcular structure The cytoskeleton is a network of fibers extending throughout the cytoplasm It organizes the cell's structures and activities, anchoring many organelles It is composed of three types of molecular structures: Microtubules Microfilaments Intermediate filaments The cytoskeleton transmits signals from the plasma membrane throughout the cell. The cytoskeleton helps to support the cell and ...

BIO311C FINAL EXAM QUESTIONS AND ANSWERS A+ GRADED What is the biological hierarchy? Levels and examples. 1. Atoms = C,H,O 2. Molecule = amino acid, sugars 3. Macromolecules = proteins, lipids 4. Parts of cells = membrane, nuclei 5. Cell = bacteria, yeast, skin cell 6. Tissue = epithelial tissue, bone 7. Organ = brain, heart 8. Organ System = immune system 9. Organism = human 10. Population = all individuals of a single species 11.. Ecosystem = collection of populations 12. Bi...

BIO 311C EXAM 1 QUESTIONS AND ANSWERS A+ GRADED four biological molecules carbohydrates, lipids, proteins, nucleic acids elements in carbohydrates carbon, hydrogen, oxygen CH2O elements in lipids carbon, hydrogen, oxygen, phosphorous elements in proteins carbon, hydrogen, oxygen, nitrogen, sulfur carbon, hydrogen, oxygen, nitrogen, phosphorous elements in nucleic acids functional groups in carbohydrates hydroxyl and carbonyl functional groups in lipids CH3/-CH2 OH (glycerol...

BIO 311C EXAM 2 QUESTIONS AND ANSWERS A+ GRADED How did life originate on earth? A)Life started with meteors from space brought extra terrestrial life from which later evolved. B)Life existed on earth from the beginning and we do not know where it came from C)Simple chemicals combined during early stages of earth and evolved into ancestral life form. D)Superhuman powers created life as they exist now and their diversity E) Aliens brought some simple life forms several million...

Bio 311C QUESTIONS AND ANSWERS A+ GRADED Model Systems Also known as model organisms, these include the small group of species that are the subject of extensive research. They are organisms that adapt well to laboratory situations and findings from experiments on them can apply across a broad range of species. Classic examples include white rats and the fruit fly Drosophila. Holism a study that considers the whole person Reductionism the reduction of complex systems to simpler componen...

Bio 311C Unit 3 QUESTIONS AND ANSWERS A+ GRADED How did experiments on transformed pneumonia-causing bacteria and radioactively-labeled bacterial viruses (Hershey & Chase) inform scientists that the genetic material was indeed DNA and not protein? By using certain enzymes that would break down protein, DNA, or RNA, they saw that the genetic make-up would only be altered with DNA Describe the double helix model of DNA, reviewing the evidence that supports this model. What were some speci...

BIO 311C SQUARECAP QUESTIONS AND ANSWERS A+ GRADED Which of the following is NOT a property of all living organisms? A) Cell membrane B) DNA C) Respiration D) Response to stimuli E) Nucleus with DNA D A scientist is testing optimal conditions to grow human skin cells in a plastic petri dish for possible grafting of burn victims. What type of experiment is this? A) In vivo - holistic B) In vivo - reductionist C) In vitro - holistic D) In vitro - reductionist E) In situ B Ne...

BIO 311C Exam 3 QUESTIONS AND ANSWERS A+ GRADED catabolism breaks things down, anabolism is the synthesis processes, and metabolism is the sum of all biochemical reactions in a cell Define metabolism, anabolism and catabolism 1st law: total energy in the universe is constant and can neither be created or destroyed 2nd law: every energy transfer or transformation results in increased randomness (entropy) within the universe Describe how the two laws of thermodynamics apply to biological ...

Bio 311C QUESTIONS AND ANSWERS A+ GRADED Matter Anything that has mass and takes up space element a substance made up of a single atom that cannot be broken down further molecule A group of atoms bonded together compound A substance made up of atoms of two or more different elements joined by chemical bonds How to calculate mass number number of protons + number of neutrons how to calculate molecular weight add up the individual atomic weights of each element * unit = g/mol Wha...

BIO311C MIDTERM 3 QUESTIONS AND ANSWERS A+ GRADED photosynthesis conversion of sunlight into light energy, in the chloroplast light reactions - thykaloid membranes (in the chloroplast) - input: sunlight, water, ADP + Pi - output: Oxygen, ATP, and NADPH - sunlight energy is absorbed by chlorophyll, which excites electrons. they create ATP and NADPH. water molecules split, and release oxygeen carbon fixation (calvin cycle) - stroma (in chloroplast) - input: carbon dioxide, ATP, and N...