Introductory Biology: Task 2

Biology Task 2 Information following This used For do question number 1-3 A student wants to conduct research on antimicrobial substances. He performed the Kirby test- Bauer on 12 product Which claimed own ability turn off microbes. Escherichia coli grown in petri dishes contains medium. To this medium is added a layer of filter paper that has been dipped in an antibacterial compound. The research results are shown like picture following This. Zone clear Which appear on around paper strain is medium without bacteria. I A H K J L B E C D F G 1. Product Which it turns out No own ability antimicrobial showed by letter … a. A, B, C, D, And E b. B, C And D c. B And E d. G e. No There is answer Which Correct Answer : C If the product does not have antimicrobial capabilities it will not form clear zone around the filter paper 2. Ability antimicrobial from a number of product the If sorted from Which strongest is … a. A > B > E > D > C b. I > C > A > L > E c. B > K > F > J > I d. D > C = K > L > E e. No There is answer Which Correct Answer : B The antimicrobial ability can be seen from the filter paper which has the largest diameter big to smallest 3. Following This statement Which Correct regarding the material genetic on bacteria are … a. Bacteria is organism Which diploid b. Bacteria own plasmids Which is part from material genetic chromosomal c. Plasmids bacteria contain genes housekeeping Which essential For endurelife cell d. Chromosome bacteria only own One point beginning replication ( origin of replication ) e. Bacteria only can own One plasmids in the the cell Answer : D Bacteria are haploid organisms, with plasmids as genetic material extrachromosomal containing nonessential genes. The number of plasmids can be more than one Information following This used For do question number 4-5 Namjoon is an undergraduate student at Stanford University. He is doing final research with the topic of the influence of substances on bacterial growth to obtain his bachelor's degree. He grow Escherichia coli in liquid medium then add 3 different substances in the culture at the same time. It measures total cell count (dotted line) and viability cell count (solid line) from each treatment in the culture every hour after administration substance. Results measurement on culture control And third substance which tested there is on picture following : a b c d 4. The following are the classes of substances given based on the results of growth curve measurementscell Which right is … a. Curve a bacteriolytic b. Curve b bacteriocidal c. Curve c control d. Curve d bacteriostatic e. Answer a And b Correct Answer : B A is the effect of bacteriostatic substances, b bacteriocidal, c bacteriolytic, and d control 5. Based on test on, possibility on moment addition substance test bacteria currentlyis at on phase … a. Exponential b. Lag c. Stationary d. Death e. Static Answer : A This can be seen in the control curve. After the addition of the substance, bacteria still increases in number until it enters the stationary phase. 6. Statement following This Which Correct about things Which relate with testNamjoon is … a. Measurement total cells count can done use spectrophotometry b. Substance Which nature bacteriocidal can turn off cell with method lyse all over cell c. All type antibiotics classified into the bacteriostatic d. Answer a and c Correct e. All answer Correct Answer : A This can be seen in the control curve. After the addition of the substance, bacteria still increases in number until it enters the stationary phase.