Nile College Biology/C&M Mid Exam 2017 PDF

BDS, Pharmacy & MB BS Programs First Year (2017/2018) Mid- Semester (1) Examination The Foundation Year Subject: Biology/Cells & Molecules Date: 28 December, 2017 (Thursday) Time: Two...

BDS, Pharmacy & MB BS Programs First Year (2017/2018) Mid- Semester (1) Examination The Foundation Year Subject: Biology/Cells & Molecules Date: 28 December, 2017 (Thursday) Time: Two Hours, 09:00-11:00 Student's Name …………………………………………………………………………………. Index No. ……………….………………… INSTRUCTIONS 1. It is important to write your index number in the space above. You may copy your index number from the attendance sheet which you will sign. 2. Be sure to write your name & index number on the MCQs answer sheet on page 8. 3. You are required to respond to All questions. It is Question # your responsibility to make sure you have 8 pages, 30 MCQS including this cover and the MCQs answer sheet. 15 4. Carefully read, and follow, the instructions for each SSAs question. If you have any enquiries or questions, 15 please direct your request strictly only to the EMQs invigilators. 5. Borrowing of writing or any other material during the Total 60 examination is not allowed. 6. Mobile phones and other electronic gadgets are Uz. Fatma Najeeb, M. Sc NOT ALLOWED with you in the examination Uz. Hadeel Eisa, M. Sc. room. 7. You must observe all of the NC Examinations Regulations. NOW is a good time to double check that nothing on, or about you, is in violation of these regulations. Muhammad Sidahmed, Ph D Module Coordinator Biology/C&M Mid Exam – 28 December, 2017 p. 1 of 8 pages  Q.1. One Best Answer MCQs: (Total: 30 Marks) You must use the answer sheet on page (8) to answer the following questions. Detach page (8) and immediately write your name and index number. Read the instructions at the top of the answer sheet carefully, and follow them precisely. Warning: Answers on the question pages will not be considered for marking at all, in any circumstance. The compound found in the largest amount in a living A cell which has a nucleus, a large central vacuole and cell is: chlorophyll is a _________________ cell. polysaccharide. nucleic acid. human protein. plant water. bacterial lipid. fungal yeast Bacterial cells are described as “Prokaryotic” because __________. The atom called “the central atom of life”, because it is found in all biomolecules, is: they have either DNA or RNA, but never both. Nitrogen. their DNA is not inside a nuclear envelop. Phosphorus. they do not have a true nucleus. Carbon. (Both b. and c. are correct.) Hydrogen. (Only c. is correct) Oxygen. The shape of a cell, and its internal structures, are Where in the cell is energy in the form of ATP consistent with its __________. produced? function Rough Endoplasmic Reticulum location among other tissue cells Smooth Endoplasmic Reticulum inherited characteristics Golgi apparatus (All of the above are correct) Ribosomes (None of the above is true) Mitochondria The _________ have genetic material that is different _____________ are NOT found in animal cells: than that of the cell: Plasma membranes Ribosomes Cell walls Mitochondria Centrioles Golgi bodies Lysosomes Nucleoli vacuoles Centrioles According to the “Cell Theory” a virus is not a cell The _____________ is the cell organelle responsible for because: the synthesis of (making) new cell proteins: it cannot live independently. Rough Endoplasmic Reticulum what it is made of is not “protoplasm”. Smooth Endoplasmic Reticulum it has no organelles. Golgi apparatus (All of the above is correct) Ribosome (None of the above is correct) Mitochondrion Biology/C&M Mid Exam – 28 December, 2017 p. 2 of 8 pages  Which of the following organelles is used for the The stage of the cell cycle when the normal amount of attachment of other organelles and for movement of a DNA’s nucleotides is doubled is the ____ phase. cell? Cilia G0 Vacuoles G1 Cytoskeleton S Endosomes G2 Mitochondria M The cell organelles which are responsible for sorting, The start of life for all true multicellular organisms is modifying and packaging synthesized proteins are the: one cell called a/an: Mitochondria. Centrioles. epithelial cell. Golgi bodies. embryonic tissue cell. Smooth Endoplasmic Reticulum. primary cell. Rough Endoplasmic Reticulum. stem cell. zygote. Cells which do not enter the cell cycle are said to be in the ____ phase. The monomers that make up proteins are called ________. M G1 nucleotides S disaccharides G2 amino acids G0 chaperones Fatty acids Which is a component of RNA but is not found in DNA? Adenosine is a nucleoside which consists of a: Phosphate pentose sugar and adenine. Adenine phosphate group and adenine. Ribose pentose sugar and a phosphate group. Thymine pentose sugar, a phosphate group, and adenine. Cytosine pentose sugar, two phosphate groups, and adenine. The rough endoplasmic reticulum (RER) appears During the progression of the cell cycle, what activates “rough” because there is a large number of ………. sequential events is attached to it. phosphorylation. vesicles Cyc + CKI. vacuoles Cdk + Cyc. ribosomes Cdk + CKI. lysosomes Cyc. microtubules (Cyc.=Cyclin, CKI=Cyclin Kinase Inhibitor, CdK= Cyclin-Dependent Kinase) Biology/C&M Mid Exam – 28 December, 2017 p. 3 of 8 pages  1. In mammals, ___________ happens only in the 6. What is the correct sequence of the stages of gonads in order to produce gametes. mitosis? (1 Metaphase, 2 Telophase, 3 Anaphase, 4 Prophase) a. Sporogony b. Budding c. Binary fission a. 1, 3, 2, 4 d. Meiosis e. Mitosis b. 4, 2, 1, 3 c. 3, 2, 4, 1 2. In meiosis, genetic crossing over occurs during ……….. d. 4, 2, 3, 1 a. Interphase e. 4, 1, 3, 2 b. Prophase I 7. The Golgi apparatus does all of the following, c. Metaphase I EXCEPT d. Prophase II a. forming vesicles. b. transporting proteins. e. Anaphase I c. synthesizing ATP. d. producing lysosomes. e. modifying proteins. 3. In meiosis, the step in progression of the cycle between Telophase I and Prophase II is called: a. Cytokinesis. 8. Which check point during the cell cycle ensures that all chromosomes are attached to the spindle? b. Interkinesis. a. The G1 Phase c. Autolysis. b. The G2 Phase d. Mass-split. c. The M Phase e. Telophase II. d. The Anaphase e. The Metaphase 4. Natural, programmed death of a cell is called: a. autolysis. b. disintegration. 9. The monomer of DNA is a: c. degradation. a. deoxyribose, a pentose sugar. b. ribose, a pentose sugar. d. collapse. c. nitrogenous base. e. apoptosis. d. nucleotide. 5. The phase of mitosis when the condensed Biology/C&M Mid Exam – 28 December, 2017 p. 4 of 8 pages  Q. 2. Structured Short answers (SSAs) (Grand total: 15 Marks) (Note: The space for an answer is meant to show you how short the answer should be.) Diagrammatic representation of the cell cycle: 2.1. Referring to the above diagram of the cell cycle, respond to the following. (Total: 7 Marks) 2.1.1. What two types of division happen in the cell doing during the M Phase? (2 marks) a. ………………………………………… b. ………………………………………… 2.1.2. How Cdks, Cyclins, and CKIs regulate and control the cell cycle. a. A Cdk molecule is a switch of stages of the cycle and is always present in the cell, but does not do anything until it is activated. How is a Cdk activated? (1 mark) ………………………………………………………………………………………………. b. What does the length of the cycle’s circle, EXCLUDING the M-Phase, represent? (1 mark) ………………………………………………………………………..…………………….. Biology/C&M Mid Exam – 28 December, 2017 p. 5 of 8 pages  c. What is “apoptosis”? (2 marks) ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… 2.2. The Cell. (Total: 8 Marks) 2.2.1. Write three facts of the “Cell Theory”. (3 marks) a) …….………………………………………………..……...……………………………………… b) ……………………………………………………………..……………………………………… c) ……………………………………………………………………………..……………………… 2.2.2. Comparison of Meiosis and Mitosis. A. List TWO benefits of mitosis to a multicellular organism. (2 marks) a) ….………………….…………………………………..……...………………………………. b) …………...…………………………………………………………………..………………. B. What happens to the chromosomes in the Prophase of mitosis that does not happen in Prophase-II of meiosis? (2 marks) ……….………………………………………………..……... ………………………………………………………………………………………….. ……………………………………………………………………………………………………… …………………………………..………………. C. With respect to the number of chromosomes, describe the daughter cells in each case: (2 marks) Products of Mitosis: ……………………………………………………..……......…………. Products of Meiosis: …………………………………………………..…………..…………. Biology/C&M Mid Exam – 28 December, 2017 p. 6 of 8 pages  Section 3. Extended Matching Questions: (Grand total: 15 Marks) Opposite each of the items in Column (B) insert the number of the correct counterpart from Column (A) as indicated by the arrows. 3.1. The functions of cell organelles. (10 Marks) Column (A): Column (B): Organelle Functions of the organelle A cell organelle, made of 2 subunits; synthesize cell 1. Golgi protein A structure of the cell made mainly of a double layer 2. Nuclei of phospholipid molecules A structural component of the cell which anchors cell 3. Nucleolus structures & enables cell movement 4. Cell Wall Associated with cell division and formation of spindle 5. Centromeres Cell transport system associated with ribosomes 6. SER The organelle which contain chromatin 7. Ribosomes Where products of the cell are modified & packaged 8. Histones Tubular network which synthesizes lipids 9. RER Location for RNA synthesis 10. Cytoskeleton Responsible for providing energy to the cell 11. Cell membrane 12. Mitochondria 3.2. The Characteristics of Living Things. (5 Marks) Column (A): Column (B): Description Terms 1. Development Feeling and interacting with the surroundings 2. Sensitivity Biochemical activity within a living organism 3. Heredity Maintenance of a relatively stable internal environment 4. Metabolism The functional unit of all living organisms 5. Homeostasis Possessing unique characteristics stored in DNA 6. Cell Biology/C&M Mid Exam – 28 December, 2017 p. 7 of 8 pages  Nile College The Foundation Year Biology/ C&M-111, Semester (1): MD OBA/MCQ test answer sheet. Student’s Name: ………………………………………………………………………………………………….. ……………………………… Student’s Index #: ………………………………………….………… Program: ……………………….. ……………….………… Instructions:.. 1. Write your name and index number in the above spaces before answering questions. 2. Carefully consider each question and the listed complementary statements (a. to e.) before deciding on which one complementary statement is your choice. 3. Find the Question number (e.g. Q.1.), locate the correct column corresponding to your choice answer letter (a., b., c., d. or e.), then completely fill-in the corresponding circle with a dark pencil. 4. The answer in any question row that shows no filled circle, contains an unclear choice or shows more than one filled circle, is cancelled and draws a mark of zero. a b c d e..... Q. 1. Q. 2. Q. 3. Q. 4. Q. 5. Q. 6. Q. 7. Q. 8. Q. 9. Q. 10. Q. 11. Q. 12. Q. 13. Q. 14. Q. 15. Q. 16. Q. 17. Q. 18. Biology/C&M Q. Mid Exam – 28 December, 2017 p. 8 of 8 pages 19.  Q. 20. a b c d e..... Q. 21. Q. 22. Q. 23. Q. 24. Q. 25. Q. 26. Q. 27. Q. 28. Q. 29. Q. 30. Biology/C&M Mid Exam – 28 December, 2017 p. 9 of 8 pages