Biotechnology
15 ECTS
Ladokcode: A113TG,A903TI
The exam is given to: TGKEB15h
ExamCode:
Date of exam: 06 March, 2018
Time: 09:00-13:00
Means of assistance:
Tillåtna hjälpmedel är lexikon. Dock EJ elektroniskt lexikon It is possible to use dictionary but not in electrical form
Total amount of point on exam: 30 points
Requirements for grading: Failed: < 18 points; Passed: ≥18 points
Additional information: True or False questions: 1 point for each right answer, but ATTENTION!!! -1 point for the wrong answer!!! Multiply choice questions: 1 point for each right answer Development questions: You can give your answers either in English or in Swedish
Next re-exam date: 2018-03-14
The marking period is, for the most part, 15 working days, otherwise it’s the following date: 2017-03-09 Important! Do not forget to write the ExamCode on each paper you hand in.
2 Examiner:
True or False questions:
Mark the following sentences with true T, or false F on the short line after the sentence. If marked correctly: 1 point. If marked incorrectly: -1 point. If there is no mark: zero point. 1. The macromolecules are the basic structural and functional components of the cell.____ 2. Ribose is the five carbon sugar found in DNA.___
3. The two general functional categories (or classes) of proteins are catalytic and enzymatic.___
4. Throughout the living world the genetic code is universal.___
5. The ability of species of Archaea to grow at higher temperatures when compared with species of Bacteria and Eukarya is most probably related to the structure of their cytoplasmic membrane.____
6. The synthesis of the amino acid tryptophan by the cell with consequent consumption of energy is an example of a catabolic reaction.____
2
Multiply choice questions:
Mark the right alternative by drawing a small but obvious ring around the letter corresponding to your choice for each of the question. 1 point of each for correct answer. No negative points if not correct answer.
Question 7
A covalent bond occurs when atoms a) Share electrons
b) Gain electrons c) Give up electrons
d) Are repelled by electrons of other atoms Question 8
Regarding early life on Earth
a) Microbial life, plant life, and animal life all appeared at about the same time
b) Microbial life existed long before animals are appeared, but has been existing since around the same as plant life
c) It is impossible to determine which type of life appeared first on Earth d) Microbial life existed on earth billions of years before plant and animal life Question 9
The presence of membrane-enclosed organelles is characteristic of a) prokaryotic cells.
b) eukaryotic cells. c) all cells.
d) viruses. Question 10
A part of the DNA encoding a protein or an RNA molecule known as a) histone.
b) chromosome. c) RNA segment. d) gene.
Question 11
The different staining patterns (purple versus red cells) when using Gram staining is related: a) to the structure of cytoplasmic membrane
b) to the structure of cell wall
c) to the structural relationship between the cytoplasmic membrane and the cell wall d) neither to the structure of the cell wall or to the structure of the cytoplasmic membrane Question 12
The cytoplasmic membrane’s functions include: a) Permeability barrier
b) Protein anchor c) Energy conservation d) All of the above
Question 13
Chemolitotrophs obtain energy from: a) Organic chemicals
b) Inorganic chemicals
c) Both organic and inorganic chemicals d) Light
Question 14
A microorganism that does not grow unless oxygen is present is a/an: a) Aerobe obligate
b) Aerobe facultative c) Anaerobe aerotolerant d) Anaerobe obligate Question 15
Hydrophilic interactions occur when
a) Nonpolar molecules dissociate in aqueous solutions
b) Nonpolar molecules interact with polar molecules in a polar environment c) Polar molecules cluster in aqueous solutions
d) Nonpolar molecules cluster in aqueous solutions. Question 16
In the absence of oxygen, Saccharomyces cerevisiae cells will breakdown glucose to CO2 and
ethanol through: a) Respiration b) Fermentation c) Oxidative phosphorylation d) Krebs cycle Question 17
The activation energy needed for a chemical reaction to occur will be ______ in the presence of enzymes.
a) Increased b) Decreased c) The same Question 18
RNA processing in Eukaryotes includes: a) Addition of a cap to the 5’ end b) Addition a poly-A tail to the 3’ end c) Splicing out introns
4
Development questions
2 point of each for correct answer Question 19
Draw a schematic picture of a nucleotide. Question 20
Give the names of 2 non polar amino acids, 1 acidic amino acid and 1 polar uncharged amino acid.
Question 21
Explain the action of the enzyme, called Lysozyme. Question 22
Explain the amphipathic nature of phospholipids. Question 23
Explain what semi-conservative way of DNA replication means? Question 24
