Lecture Exam 1. M C/B 01201-111 Biology Department. Attempt all questions. Full
ID: 211646 • Letter: L
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Lecture Exam 1. M C/B 01201-111 Biology Department. Attempt all questions. Full points: 100 Time allowed: 50 minutes, instuctor: Dr MChowohury, $18 Circle the ONE best answer 1. The lowest level of biological organization that can perform all the activies required for lfe is the A. Atom B Molecule C. Cell D. Population 2. Each of the following is a characteristic of life EXCEPTt A. Reproduction D. Classification B Energy processing C. The ablity to respond to changes in the environment 3 Which of the following is a cell organelle? A Nucleus C Chloroplast D. All of the above D. Bicsphere L All te organismsinhabiting in a localilymake up ar A. Community B. Ecosystem C. Population 5. Biologists place closely related specles (auch as polar bear& brown bearl into the same A Domain B. Kingdom C. Phylum D. Genus & Which of the foilwing does NOT belong to the domain Eukarya? B Animalia C. Plantae D. Fung A. Archaea 7. The correct sequence of steps in the sclentfic method A. Ex 8. Isotopes of an element have diferent A. Protons B. Observation- C. 8 Neutrons C. Electrons D Both 8&C; 9. Which of these did Staniey Milr place in his experimental system to show that organic molecules could have arisen fom inorganic molecules on the primitive earth by abiotic process B. Various organic moleaules C.Priritve gases (HgO, H. NHs CH ) .Minerals A. Proteins 10. The atomic number of an element tels you the: A Number of neutrons in the nucleus B. Number of protons in the atom 11. Which of following is a very weak bond? A Covalent bond B. Hydrogen bond C. lonic bond. D. Both A&C; 12 Sharing of a pair of valenoe electrons by two atoms results in the formation of this bond C Weight of the atom D. All of the above A Hydrogen band B lanic bond C. Covalent bond D. All of the above 13. Acids A. Release hydragen lons C. Resists any change in pH B. Have apH value more than 7 D. Both A &8 are correct. 14. Which of the following subatomic particles has very little weight and negative charge? A. Proton B. Neutrorn 5. The polarity of water results in: A H-bonding B. Adhesion C. Covalent bonding 16.Astrong base wil beinthe flowing pH range:A03 B46 c.7 DL 12-14 7. Translation is the A. Making of DNA from DNA in the nucleus 8 Proteins do NOT funcion as: A Hormone B. Enzyme C. Hereditary molecule D. Antibody E. Transport molecule 19. What type of molecule consists of a phosphate, a pentose sugar, and a nitrogen-containing base? C. Electron D. Both A& B are correct. D. lonic bonding B. Making of RNA from DNA in the nucleus D. Both B&C; are correct C. Making of protein from RNA by the ribosome in cytoplasm A. Trigyceride B. Polysaccharide C. Phospholipid D. Nucleotide p. 1/2Explanation / Answer
The answer to the question 1 is Option C - cell. The cell is the structural and functional unit of an organism.
The answer to the question 2 is Option D - Classification. This is developed by humans to understand the living organisms in a better way.
The answer to the question 3 is Option D - All of the above.
The answer to the question 4 is Option A - Community.
Community: It comprises of all the populations in a given area.
Ecosystem: All the living organisms interacting with the environment is called an ecosystem
Population: Group of similar species living in a given area
Biosphere: It is the sum of all the ecosystems on the earth
The answer to the question 5 is Option D - Genus
The answer to the question 6 is Option A - Archaea. This belongs to separate kingdom
The answer to the question 7 is Option B - Observation, Hypothesis, Experiment, Conclusion
The answer to the question 8 is Option B - Neutrons
The answer to the question 9 is Option C - Primitive gases (Water, Hydrogen, Ammonia, Methane). This experiment is commonly called as the Miller-Urey experiment. It proved the formation of amino acids billions of years ago.
The answer to the question 10 - Option B - Number of protons in the atom
The answer to the question 11 - Option B - Hydrogen bond. This bond is a form of Van der wall's interaction. Hence it is weakest. The strongest is the covalent bond.
The answer to the question 12 - Option C - Covalent bond
The answer to the question 13 - Option A - Hydrogen ion
The answer to the question 14 - Option C - Electron
The answer to the question 15 - Option A - Hydrogen bonding
The answer to the question 16 - Option D - 12-14
The answer to the question 17 - Option C - Making of protein from RNA by the ribosome in the cytoplasm
The answer to the question 18 - Option C - Hereditary molecules. DNA and RNA act as hereditary molecules
The answer to the question 19 - Option D - Nucleotide.
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