CHAPTER 5: MICROIAL METABOLISM PRE-TEST 1: Which of the following types of transport involves the expenditure of energy and special membrane proteins? ACTIVE TRANSPORT 2: Which of the following molecules serves as the short-term recyclable energy supply for a cell? ATP 3: Which of the following is a waxy lipid found predominantly in the cell walls of Mycobacterium? MYCOLIC ACID 4: Catabolic reactions are chemical reactions that BREAK LARGE MOLECULES APART 5: Denaturation is typically a problem with which of the following? PROTEINS 6: A difference in the concentration of a chemical on both sides of a membrane leads to which of the following phenomena?
Why is blood agar useful as a primary isolation medium? 5. What is the major difference between Modified Thayer-Martin (MTM) and chocolate agar? When would you use MTM rather than chocolate agar? Exercise 4: Some metabolic activities of bacteria 1.
Vitamin losses can occur through chemical reactions which lead to inactive products. With regards to food chemistry, the main concern is to maximize vitamin retention by minimizing aqueous extraction (leaching) and chemical changes such as oxidation and reaction with other food constituents for a small vitamin deficiency can already cause diseases in humans (Fennema, 1996). Vitamins are mainly classified into two based on solubility: the fat soluble vitamins and the water soluble vitamins. Fat soluble vitamins are composed of Vitamins A, D, E and K while
How do proteins associate with cell membrane? They associate as either peripheral or integral proteins. Associating as peripheral or integral depends on whether they are hydrophobic and can attach into the bilayer or hydrophilic and must stay on the outside of the bilayer via ionic interactions or H bonds. Integral proteins usually must be removed with detergents. How does the presence of cholesterol affect lipid
Blood and Cerebrospinal Fluid Which of the following is associated with dental carries? Streptococcus pneumoniae Streptococcus mutans Lactococcus lactis Staphyloccus aureus The answer is b. Streptococcus mutans Drugs preventing the formation of the bacterial cell wall are? A) Rifampin B) Trimethoprim C) Beta-lactams D) Aminoglycosides E) Erythromycin Correct Answer: C, Beta-lactams Each of the following represent a virus except___________ a) has a nucleocapsid b) contains ribosomes c) helical d) contains DNA or RNA e) icosahedral The correct answer is b. The growth rate of bacteria is also known as: a) quick time b) stationary phase c) doubling time d) reproduction phase Answer is c) doubling time The amoeba that gets through the nasal passageways as a result of swimming in warm water is known as ____________. a. Cronobacter sakazaki b. Acanthamoeba c. Nagleria fowleri d. Toxoplasma gonadii e. Clostridium tetani Answer: C. Nagleria fowleri All of the following can be transmitted sexually EXCEPT: A) Chlamydia B) Gonorrhea C) Syphilis D) Tetanus E) HIV Correct answer is D Tetanus Changes in which of the following characterizes mutations?
P2 Outline the Main Tissues Of The Body Epithelial Epithelial tissue is basically the linings of both the internal and external surfaces of the body and can be divided into two groups. The groups depend upon the number of layers of which it is composed. These two groups are simple epithelial and compound. Simple squamous are thin, flat plates and their main function is osmosis (which is the passage of water molecules from a region of low concentration to one of high concentration through a semi-permeable membrane) and diffusion (which is the passage of molecules from a high concentration to a low concentration). They form the lining of cavities such as the mouth, blood capillaries, heart and lung alveoli and make up the outer layers of the skin.
Next, words associated with the intervention of basin-less baths. The terms include basin-less bath, interventional patient hygiene, skin antiseptics, and chlorhexidine. Then, the comparison feature keywords are baths and bath basins. The result of HAIs provides gross data on several comparisons of practice changes. The general search of HAIs will yield a high volume of studies.
Introduction: You are aware that sugar dissolves in water but oil does not. What factors determine whether one substance will dissolve in another? A solvent is a substance that is capable of dissolving other substances and forming a homogeneous mixture called a solution. The substance dissolved is called the solute and is the component present in the smallest amount. The dissolving process involves a consideration of the relative strength of three intermolecular attractive forces.
According to the Bronsted- Lowry Model, aids donate an H+ ion to another substance, while bases can accept an H+ ion. On the other hand, the Arrehenius Model states that acids produce H+ ions and bases produce OH ions when submerged in water. The hypotheses made states that all of the household substances are acidic for the following reasons: vinegar, due to its common use as a cleaning agent, to break down grime, as well as detergent, for its use in removing stains from clothing. Soda was determined to be acidic, because it destroys the enamel on teeth, along with ammonia, a powerful cleaning agent known for breaking down dirt. Drain cleaner unclogs drains by breaking down the substances caught in the drain due to its acidic quality.
From experimental results, it is found that the ratio of funnel speed to flow area of mortar with a fixed amount of super plasticizer is almost constant, independent of the water powder ratio. The higher the amount of super plasticizer the lower is the ratio of funnel speed to flow area. This ratio is proposed as an index for the effect of super plasticizer on mortar flowability and viscosity from the viewpoint of achieving self-compatibility. This index is useful to evaluate the amount of super plasticizer for proper flowability and viscosity of mortar. Sukumar and Nagamani (2010) reported the relation between superplasticizer dosage and fly ash content existed in SCC mixes with 8-52% fly ash, slump flow of 742-793 mm and w/p ratio of 0.31-0.34.