BIO 311C UNIT 2 EXAM QUESTIONS AND ANSWERS | BIOLOGY EXAM
PREP & STUDY GUIDE 2026/2027
All cells contain nucleus - correct answer ✔✔Cell Theory in its modern form includes all of the
following postulates except
All organisms are composed of one or more cells.
Cells are the smallest living things.
Cells arise only by division of a previously existing cell.
All cells contain nucleus
Cell is the unit of life.
Viruses - correct answer ✔✔You would be wasting your time if you were trying to use a light
microscope to see_______
Carbohydrates and Triglycerides - correct answer ✔✔Which of the following molecules do not
have any charges on them so that they cannot be separated by gel electrophoresis? There may
be more than one answer.
A)
Carbohydrates
B)
Trigylcerides
C)
Proteins
D)
DNA
, E)
RNA
Anode; charge - correct answer ✔✔In agarose gel electrophoresis, DNA or RNA fragments
migrate towards ___________ end of the gel plate because of their____________.
3,2,4,1 - correct answer ✔✔Arrange the following sequence of procedures in the proper order
in this experiment done to determine proteins present in pea plants during germination.
1. Load the proteins in polyacrylamide gel electrophoresis and separate them
2. Break the cells by grinding them in liquid nitrogen and suspending in a buffer
3. Select a suitable tissue to isolate proteins expressed only during germination
4. Centrifuge the broken cells to purify proteins from other molecules
Lipids: TLC, HPLC, MS, GC
Carbohydrates: MS, GC - correct answer ✔✔Lipids and carbohydrates do not have any charges
associated with them, making it difficult to separate them by gel electrophoresis. What
methods are good for separating such molecules?
Collect a sample, observe under microscope - correct answer ✔✔A sewage line broke and
contaminated drinking water source of a rural town. You are asked to investigate if there is any
bacterial contamination after fixing the sewage leak. What methods would you follow?
isolate the bacteria, view under a microscope and look for the proteins specific to ecoli - correct
answer ✔✔You are working for CDC and investigating a toxic E. coli contamination in lettuce.
Which method(s) would be useful to definitely identify the toxic E. coli?
Bacteria - correct answer ✔✔You have isolated some organisms that are unicellular with cell
wall containing peptidoglycan and have flagella without any membrane enclosure. Which group
do these organisms belong to?
PREP & STUDY GUIDE 2026/2027
All cells contain nucleus - correct answer ✔✔Cell Theory in its modern form includes all of the
following postulates except
All organisms are composed of one or more cells.
Cells are the smallest living things.
Cells arise only by division of a previously existing cell.
All cells contain nucleus
Cell is the unit of life.
Viruses - correct answer ✔✔You would be wasting your time if you were trying to use a light
microscope to see_______
Carbohydrates and Triglycerides - correct answer ✔✔Which of the following molecules do not
have any charges on them so that they cannot be separated by gel electrophoresis? There may
be more than one answer.
A)
Carbohydrates
B)
Trigylcerides
C)
Proteins
D)
DNA
, E)
RNA
Anode; charge - correct answer ✔✔In agarose gel electrophoresis, DNA or RNA fragments
migrate towards ___________ end of the gel plate because of their____________.
3,2,4,1 - correct answer ✔✔Arrange the following sequence of procedures in the proper order
in this experiment done to determine proteins present in pea plants during germination.
1. Load the proteins in polyacrylamide gel electrophoresis and separate them
2. Break the cells by grinding them in liquid nitrogen and suspending in a buffer
3. Select a suitable tissue to isolate proteins expressed only during germination
4. Centrifuge the broken cells to purify proteins from other molecules
Lipids: TLC, HPLC, MS, GC
Carbohydrates: MS, GC - correct answer ✔✔Lipids and carbohydrates do not have any charges
associated with them, making it difficult to separate them by gel electrophoresis. What
methods are good for separating such molecules?
Collect a sample, observe under microscope - correct answer ✔✔A sewage line broke and
contaminated drinking water source of a rural town. You are asked to investigate if there is any
bacterial contamination after fixing the sewage leak. What methods would you follow?
isolate the bacteria, view under a microscope and look for the proteins specific to ecoli - correct
answer ✔✔You are working for CDC and investigating a toxic E. coli contamination in lettuce.
Which method(s) would be useful to definitely identify the toxic E. coli?
Bacteria - correct answer ✔✔You have isolated some organisms that are unicellular with cell
wall containing peptidoglycan and have flagella without any membrane enclosure. Which group
do these organisms belong to?
