FREE AND STUDY GAMES ABOUT SCI250 EXAM

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FREE AND STUDY GAMES ABOUT SCI250 EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -43 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: The unit of molecules (monomers) of carbohydrates are

Answer:

AMINO ACIDS

Question 2: The suffic -virales is given to the following terms within the taxon

Answer:

ORDER Question 3: RNA viruses belong to which of the following types according to the Baltimore classification system?

Answer:

III, IV, V

Question 4: In correct sequence, the five "I's" in microbiology stand for?

Answer:

INOCULATION

INCUBATION

ISOLATION

INSPECTION

IDENTIFICATION

REF: p. 156

Question 5: Chemically, most enzymes are

Answer:

PROTEINS

Question 6: The time in minutes in which 90% of the bacterial population will be killed at a given temperature is called the?a.) Generation time b.) Thermal death time c.) Sterilization time

d.) Decimal reduction time. REF: P. 141

Answer:

DECIMAL REDUCTION TIME

Question 7: Fossils of prokaryotes go back (blank) billion years

Answer:

3.5 to 4.0 Question 8: The unique cell organelle foudn in the Archaezoa and that appears to be a remnant of mitochondria is called a (blank).

Answer:

MITOSOME

Question 9: Bacteria that thrive in extremely dry conditions are classified as (blank). REF:

• 143

Answer:

XEROPHILES

Question 10: Picornaviridae are (blank) viruses

Answer:

NONENVELOPED ssRNA Question 11: Which of the following microorganisms can be cultured only in the footpads of

mice or a species of armadillo? REF: p. 158

Answer:

MYCOBACTERIUM LEPRAE

Question 12: A toxic, odorless gas often used as a sterilizing agent in hospitals and dental

offices is. REF: p. 148

Answer:

ethylene oxid

Question 13: Name the organism used to produce cheese.

a.) Priopionibacterium Shermanii b.) Acetobacter aceti c.) Giardia d.) Fusobacterium

Answer:

PROPRIONIBACTERIUM SHERMANII

Question 14: The main functions of spores in eukaryotic cells is (blank).

Answer:

PROPAGATION

Question 15: Which parts of a virus aid in the attachment to the host cell membrane receptors?

Answer:

SPIKES

Question 16: The correct hierarchial order for virus classsification is

Answer:

ORDER, GENUS, FAMILY, SUBFAMILY, SPECIES

Question 17: Matrix formed outside the plasma membrane is referred to as?

Answer:

GLYCOCALYX

Question 18: Enzymatic reactions that can be expressed in which of the following chemical notations?

Answer:

E+S=P

Question 19: A fully assembled virus is called a?

Answer:

VIRION

Question 20: The formation of polymers from simpler substances is referred to as (blank)

Answer:

POLYMERIZATION

Question 21: Protons are

Answer:

PART OF THE ATOMIC NUCLEUS

Question 22: Name the amino acid that is also referred to as the "start" codon.

Answer:

METHIONINE

Question 23: Which of the following is commonly referred to as a pinworm?

a.) Enterobius vermicularis b.) Necator americanus c.) Ascaris lumbricoides d.) Ancylostoma duodenale

Answer:

ENTEROBIUS VERMICULARIS

Question 24: What type of microsco is used to examine structures down to the atomic level?A.) Scanning electron microscope b.) Scanning probe microscope c.) Atomic force microscopes d.) Transmission electron microscope

Answer:

SCANNING PROBE MICROSCOPE

Question 25: Bacteria that have flagella that are distributed over the general cell surface are referred to as

Answer:

PERITRICHOUS