Biology and Genetics

1-Whereas spontaneous generation _________________, biogenesis _______________.

1-Whereas spontaneous generation _________________, biogenesis _______________. a. was supported by the research of Louis Pasteur, was supported by the work of Francesco Redi. b. …

1-Which of the following BEST describes the theory of natural selection? a-The g

1-Which of the following BEST describes the theory of natural selection? a-The genetic make-up of a population gradually changes from one generation to the next. c-Each specie…

1-Which of the following is NOT a function of the nervous system? Sensory functi

1-Which of the following is NOT a function of the nervous system? Sensory function Integrative function Motor function All are functions of the nervous system 2-Which of the follo…

1-Which of the following is NOT a function of the nervous system? Sensory functi

1-Which of the following is NOT a function of the nervous system? Sensory function Integrative function Motor function All are functions of the nervous system 2-Which of the follo…

1-Which of the following is NOT true regarding HACCP and efforts to prevent food

1-Which of the following is NOT true regarding HACCP and efforts to prevent food contamination? FSMA expanded coverage of HACCP from just the FDA to also include the USDA. b. Ever…

1-Which of the following statements is true for the loop model in supercoiling o

1-Which of the following statements is true for the loop model in supercoiling of DNA: a. Represent fourth level of supercoiling of DNA. b. Forming as a result of folding of 300 n…

1-Which of the four testing mechanism (ph meter,ph paper,, btb, litmus paper) is

1-Which of the four testing mechanism (ph meter,ph paper,, btb, litmus paper) is least specific in identifying the amount of hydrogen ion present? 2- Which two of the four tests( …

1-Why are the poor and minorities more likely to suffer health problems that res

1-Why are the poor and minorities more likely to suffer health problems that result from exposure to pollution? A. They are poorly educated about the risks of pollution. B. They a…

1-You are working in a microbial genetics laboratory studying lactose transport

1-You are working in a microbial genetics laboratory studying lactose transport proteins. The bacterial strain you are working with, Escherichia coli SOS, has a mutated lactose tr…

1-a. Explain how the gastrointestinal blood loss caused a reduction in human\'s

1-a. Explain how the gastrointestinal blood loss caused a reduction in human's arterial pressure. b. Why is human being's arterial pressure is lower in the upright (standing) posi…

1-between what levels does temperature inversion occur and what does this imply

1-between what levels does temperature inversion occur and what does this imply about the stability of the column? (3 marks) 2-Knowing that lifting condensation level is 770 HPA,w…

1-explain what is meant by the term ‘risk factor’. 2-explain the nature of the d

1-explain what is meant by the term ‘risk factor’. 2-explain the nature of the difference between modifiable and non-modifiable risk factors. 3-Identify and briefly describe three…

1-fore yo- make sure 2. What result is expected of a mixed smear of E. coli and

1-fore yo- make sure 2. What result is expected of a mixed smear of E. coli and S. epidermidis if a. the decolorizer is left on the slide for 60 seconds? b. the decolorizer is nev…

1-mucus in the mucus membrane is an example of the ? a- first b-second c-third l

1-mucus in the mucus membrane is an example of the ? a- first b-second c-third line of defense 2-which of the following is not a first line of defense? a- skin b- tears c- saliva …

1-mucus in the mucus membrane is an example of the ? first or second or third li

1-mucus in the mucus membrane is an example of the ? first or second or third line of defense 2-which of the following is not a first line of defense? skin or tears or saliva or f…

1-the asian crab(homigrapsus sanguineus) is one of the most abundant organisim i

1-the asian crab(homigrapsus sanguineus) is one of the most abundant organisim in the rocky intertidal zone.where did it come from?describe its habitat,its apperance, its food cha…

1-what is partial pressure? Explain it’s role in gas exchange? 2- Describe the f

1-what is partial pressure? Explain it’s role in gas exchange? 2- Describe the factors affecting gas exchange. Apply these factors to the efficiency of a tracheal system, gills, l…

1. #1 (Oldest) 2. #2 3. #3 4. #4 5. #5 6. #6 7. #7 8. #8 9. #9 10. #10 11. Numbe

1. #1 (Oldest) 2. #2 3.#3 4.#4 5.#5 6.#6 7.#7 8.#8 9.#9 10.#10 11. Number of sedimentary rock layers that were deposited. 12.Type of oldest fault (Normal or Reverse) 13.Type o…

1. ( 10 points ) You are studying wing colour in a newly discovered type of butt

1. (10 points) You are studying wing colour in a newly discovered type of butterfly. The ZW system is used in butterflies, where males are Z/Z and females are Z/W. You have two di…

1. ( 10 points ) You have a strain of fruit flies that are black in colour ( b )

1. (10 points) You have a strain of fruit flies that are black in colour (b) instead of the usual tan, have shortened wings (sw) relative to wild type, and pinkish eyes (p) instea…

1. ( 2 points ). In humans, cataracts in the eyes and fragility of the bones are

1. (2 points). In humans, cataracts in the eyes and fragility of the bones are caused by dominant alleles that assort independently. A man with cataracts and normal bones marries …

1. ( T/F ) Peptide bond formation is catalyzed by multicomplex proteins of ribos

1. (T/F) Peptide bond formation is catalyzed by multicomplex proteins of ribosome. 2. (T/F) All the incoming tRNAs enter A site. 3. (T/F) Before ribosome binds to mRNA, the small …

1. (0) (15 to 25) (30 to 40) deg N and S 2. (10 degrees S and 10 degrees N) (15

1. (0) (15 to 25) (30 to 40) deg N and S 2. (10 degrees S and 10 degrees N) (15 and 20 degrees, N and S) (25 and 30 degrees, N and S) 3. (polar easterlies above 60 degrees latitud…

1. (1 point) The endocrine and nervous systems are communication systems, howeve

1. (1 point) The endocrine and nervous systems are communication systems, however they have different properties. Which one is more likely to transfer the information to multiple …

1. (1 point)- Please order (lowest to the highest) the nitrogenous wastes Urea,

1. (1 point)- Please order (lowest to the highest) the nitrogenous wastes Urea, Ammonia and Uric acid based on their requirement of water for secretion. 2. (2 points)- In mammals,…

1. (1 pt) You have used the BioRad GMO Investigator™ Kit to test whether your mo

1. (1 pt) You have used the BioRad GMO Investigator™ Kit to test whether your morning breakfast of cornflakes and strawberries contains GMO foods. Your results are shown below Pla…

1. (1.5 points) A gene encodes a polypeptide 20 amino acids long containing an a

1. (1.5 points) A gene encodes a polypeptide 20 amino acids long containing an alternating sequence of glycine and tyrosine. What are the sequences of nucleotides corresponding to…

1. (10 marks) In an E. coli mapping experiment a cross is made between an Hfr st

1. (10 marks) In an E. coli mapping experiment a cross is made between an Hfr strain that is a+ b+ d+ in genotype and an F- strain that is a- b- d- in genotype. Interrupted-mating…

1. (10 points) From a kinetics experiment, Kea was determined to be 3555see1. Fo

1. (10 points) From a kinetics experiment, Kea was determined to be 3555see1. For the kinetic assay, 0.3mL of a 0.25mg/mL solution of enzyme was used, and the enzyme has a molecul…

1. (10 points) In a recently published article it was shown that the two active

1. (10 points) In a recently published article it was shown that the two active site cysteine residues (Cys 12 and Cys 15) of the small thioredoxin protein BC3987 have pKa values …

1. (10 pts) Histidine can be decarboxylated in an enzyme-catalyzed reaction to f

1. (10 pts) Histidine can be decarboxylated in an enzyme-catalyzed reaction to form histamine. When the body produces excess histamine, the singly positively charged histamine int…

1. (10 pts.) The recommended daily allowance for the vitamin Niacin is 15 mg/day

1. (10 pts.) The recommended daily allowance for the vitamin Niacin is 15 mg/day. How would glycolysis be affected by Niacin deficiency? 2. (10 pts.) You recall that BPG, or 2,3-b…

1. (10) Hemoglobin Ohio is a mutant HB in which beta 142 (H20) Ala is replaced b

1. (10) Hemoglobin Ohio is a mutant HB in which beta 142 (H20) Ala is replaced by Asp. Explain the following properties of the mutant protein. 1or2 sentences is enough. Ba ?2 BPG …

1. (10pt) You have a strain of fruit flies that are black in colour ( b ) instea

1. (10pt) You have a strain of fruit flies that are black in colour (b) instead of the usual tan, have shortened wings (sw) relative to wild type, and pinkish eyes (p) instead of …

1. (10pts) One of the solutions used to make bacterial cells competent is CaCl2

1. (10pts) One of the solutions used to make bacterial cells competent is CaCl2 (molar mass = 110.98 g/mol). Your lab instructor will perform this task for you prior to the start …

1. (10pts) One of the solutions used to make bacterial cells competent is CaCl2

1. (10pts) One of the solutions used to make bacterial cells competent is CaCl2 (molar mass = 110.98 g/mol). Your lab instructor will perform this task for you prior to the start …

1. (1pt each) The following diagram lists different classes of mutants found in

1. (1pt each) The following diagram lists different classes of mutants found in a temperature sensitive screen for defective secretion. Red dots represent proteins that are normal…

1. (1pt each) The following diagram lists different classes of mutants found in

1. (1pt each) The following diagram lists different classes of mutants found in a temperature sensitive screen for defective secretion. Red dots represent proteins that are normal…

1. (1pt each) The following diagram lists different classes of mutants found in

1. (1pt each) The following diagram lists different classes of mutants found in a temperature sensitive screen for defective secretion. Red dots represent proteins that are normal…

1. (1pt) You have 8 plasmid preparations you want to digest with BamHl and Xhol.

1. (1pt) You have 8 plasmid preparations you want to digest with BamHl and Xhol. Assume that both enzymes work well in Buffer 2 and both need BSA. You want to digest 1.0 pg of eac…

1. (2 each) Define/Compare/Contrast/Distinguish these three terms F plasmid F\'

1. (2 each) Define/Compare/Contrast/Distinguish these three terms F plasmid F' plasmid (and how is it formed) Hfr cell (and how is it formed) 2. (2) With the technique of interrup…

1. (2 points) The following natural sources and sinks of CO2 are taken directly

1. (2 points) The following natural sources and sinks of CO2 are taken directly from the Intergovernmental Panel on Climate Change's (IPCC) most recent Assessment Report (AR5) and…

1. (2 points) You are doing FISH using cells from a living male who had slow gro

1. (2 points) You are doing FISH using cells from a living male who had slow growth rate before birth, low birth weight, heart defects, small jaw and head and overlapping fingers.…

1. (2 points-0.5 points each) Please determine whether the individual below will

1. (2 points-0.5 points each) Please determine whether the individual below will be male or female a. XY Human b. ZW Pigeon ?.?? C. elegans d. XX Tiger 2. (2 points) For each of t…