Ull, please shade both A and B J choose the letter F as an answ PART A:QUESTIONS

Question

Ull, please shade both A and B J choose the letter F as an answ PART A:QUESTIONS 1-38 Multiple choices (1-5) 1. When smears of microorganisms are stained, the smear is heat fixed in order to a. kill the organism attach the organism firmly on the slide c. kill the organism and attach the organism firmly on the slide d. neither kill the organism nor attach the organism firmly on the slide 2. Before heat fixation, a wet smear of bacterial cells on a slide must be first blotted dry c. rinse briefly with water d. none of the answers are correct stained with a basic dye 3. The use of a single stain to color a bacterial cell is commonly referred to as a. differential stain b. negative stain Osimple stain none of the abo 4. After the primary stain has been added but before the decolorizer has been used, gram-positive órganisms are stain a. purple; purple -and gram-negative are stained. blue; colorlessunk d, pink; pinlk 5. Staphylococcus aureus is a. gram positive cocei b. gram positive rods Cgram negative cocci d. gram negative rods True or False (True A; False-B) (6-9) 6. The only asexual spore produced by yeasts is called blastopore, or bud 7. Metals are essential in bacterial metabolism because they are cofactors in enzymatic reactions. 8. With a pure culture, one is able to study organism the cultural, morphological and physiological characteristics of an individual organism 9. Most bacteria grow best at neutral pH value values around 8.7 T Multiple choices (10-12) 10. Which of the following is/are involved in bacterial motility? 1. axial filaments 2. cilia 3. pili a. 1-2 5. microvilli e. all of the above 4. flagella b. 1-3 c. 1-4 11. Which of the following is true about bacteria? a. they lack a defined nucleus surrounded by nuclear membrane b. they lack cellular organelles such as mitochondria and chloroplast c. their ribosomes are structurally different than higher cells d. all the sentences above are true

Explanation / Answer

1.c) kill the organism and atach the organism firmly on the slide.

2.a) blotted dry.

3.c) simple stain.

4.a) purple, purple

5.a) gram positive cocci

6.F

7.T

8.T

9.F ( as neutra pH is 6.5-7)

10.4) flagella

11.d

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