bio 51 lab practical 2 Exam
comprehensive questions and verified
answers 2026
hierarchy - Correct answer-organisms are grouped into ever more inclusive
categories
DNA, fossil records - Correct answer-some non-morphological methods for
categorizing different species
bacilli - Correct answer-rod-shaped bacteria
cocci - Correct answer-sphere-shaped bacteria
spirula - Correct answer-spiral-shaped bacteria
streak plate method - Correct answer-standard method used to ensure that scientists
are looking at a colony grown from a single individual (isolated colony)
partially covered - Correct answer-when inoculating your streak plate, keep the
agar ___________ _____________ to prevent contamination by other bacteria
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, sterile swab - Correct answer-used to remove bacteria from the culture tube
iodine - Correct answer-Lugol's solution contains _______ to set the stain
safranin - Correct answer-pink/red stain
red - Correct answer-color of gram-negative bacteria
violet - Correct answer-color of gram + bacteria
crystal violet, Lugol's solution, acetone, safranin - Correct answer-order of
solutions applied during a gram stain
zone of inhibition - Correct answer-the region around the antibiotic-soaked dish
that is free of bacteria
sum(Yi - meanY)^2 - Correct answer-sum of squares (SS)
SS/DF - Correct answer-variance (s^2)
peptidoglycan - Correct answer-most common component found in the cell wall of
bacteria
protein-carbohydrate - Correct answer-peptidoglycan is a _______ - _______
complex polymer
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comprehensive questions and verified
answers 2026
hierarchy - Correct answer-organisms are grouped into ever more inclusive
categories
DNA, fossil records - Correct answer-some non-morphological methods for
categorizing different species
bacilli - Correct answer-rod-shaped bacteria
cocci - Correct answer-sphere-shaped bacteria
spirula - Correct answer-spiral-shaped bacteria
streak plate method - Correct answer-standard method used to ensure that scientists
are looking at a colony grown from a single individual (isolated colony)
partially covered - Correct answer-when inoculating your streak plate, keep the
agar ___________ _____________ to prevent contamination by other bacteria
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, sterile swab - Correct answer-used to remove bacteria from the culture tube
iodine - Correct answer-Lugol's solution contains _______ to set the stain
safranin - Correct answer-pink/red stain
red - Correct answer-color of gram-negative bacteria
violet - Correct answer-color of gram + bacteria
crystal violet, Lugol's solution, acetone, safranin - Correct answer-order of
solutions applied during a gram stain
zone of inhibition - Correct answer-the region around the antibiotic-soaked dish
that is free of bacteria
sum(Yi - meanY)^2 - Correct answer-sum of squares (SS)
SS/DF - Correct answer-variance (s^2)
peptidoglycan - Correct answer-most common component found in the cell wall of
bacteria
protein-carbohydrate - Correct answer-peptidoglycan is a _______ - _______
complex polymer
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
