ASU BIO 181 EXAM 1 WITH ACTUAL QUESTIONS
AND 100% VERIFIED ANSWERS | LATEST 2025/ 2026
UPDATE | GRADED A+ | 100% SUCCESS
For a protein to enter the endoplasmic reticulum as part of the
endoplasmic reticulum's lumen or part of the endoplasmic reticulum's
membrane:
A. The messenger RNA goes directly to the ER.
B. A ribosome binds to the mRNA and a short stretch of protein is
synthesized that contains a signal sequence.
C. Ribosomes at the endoplasmic reticulum bind to the protein
D. Is a random event and one day the protein could go to the ER and on
another day the same protein could associate with a free polyribosome.
E. None of the above. - correct answer -B. A ribosome binds to the
mRNA and a short stretch of protein is synthesized that contains a signal
sequence.
Explain the evolutionary origin of mitochondria. - correct answer -
Anaerobic eukaryote engulfed an aerobic alpha-proteobacterium which
then became an endosymbiont providing ATP from respiration while
receiving substrates and protection
,It is a simple matter (i.e., thermodynamically favorable) for a vesicle to
form from the endoplasmic reticulum. - correct answer -FALSE
Amino acids can be largely subdivided into two groups. What are the
two groups? - correct answer -Hydrophilic and Hydrophobic.
The ER is contiguous with the Golgi apparatus. - correct answer -FALSE
What is the difference between a triglyceride and a phospholipid? -
correct answer -Triglycerides have three fatty acids attached to the
glycerol whereas phospholipids have one of the fatty acids replaced by
a phosphate group.
What are the orphaned organelles orphaned from? - correct answer -
Orphaned from the endomembrane system
When a vesicle fuses with the plasma membrane the contents of the
lumen of the vesicle are:
, A. Ligands that enter the nucleus.
B. Ligands that become the part of the plasma membrane.
C. Ligands that are used in cell communication.
D. Two of the above.
E. Part of the nuclear pore complex. - correct answer -C. Ligands that
are used in cell communication.
Draw a phospholipid and make sure the numbers of carbons are clearly
identified. - correct answer -
Heterochromatin does not exist in interphase nuclei. - correct answer -
FALSE
Naked DNA does not exist in Nature but scientists can make naked DNA
in a test tube. - correct answer -TRUE
Molecular motors run on which two cytoskeletal filament systems? -
correct answer -ACTIN FILAMENTS AND MICROTUBULES
AND 100% VERIFIED ANSWERS | LATEST 2025/ 2026
UPDATE | GRADED A+ | 100% SUCCESS
For a protein to enter the endoplasmic reticulum as part of the
endoplasmic reticulum's lumen or part of the endoplasmic reticulum's
membrane:
A. The messenger RNA goes directly to the ER.
B. A ribosome binds to the mRNA and a short stretch of protein is
synthesized that contains a signal sequence.
C. Ribosomes at the endoplasmic reticulum bind to the protein
D. Is a random event and one day the protein could go to the ER and on
another day the same protein could associate with a free polyribosome.
E. None of the above. - correct answer -B. A ribosome binds to the
mRNA and a short stretch of protein is synthesized that contains a signal
sequence.
Explain the evolutionary origin of mitochondria. - correct answer -
Anaerobic eukaryote engulfed an aerobic alpha-proteobacterium which
then became an endosymbiont providing ATP from respiration while
receiving substrates and protection
,It is a simple matter (i.e., thermodynamically favorable) for a vesicle to
form from the endoplasmic reticulum. - correct answer -FALSE
Amino acids can be largely subdivided into two groups. What are the
two groups? - correct answer -Hydrophilic and Hydrophobic.
The ER is contiguous with the Golgi apparatus. - correct answer -FALSE
What is the difference between a triglyceride and a phospholipid? -
correct answer -Triglycerides have three fatty acids attached to the
glycerol whereas phospholipids have one of the fatty acids replaced by
a phosphate group.
What are the orphaned organelles orphaned from? - correct answer -
Orphaned from the endomembrane system
When a vesicle fuses with the plasma membrane the contents of the
lumen of the vesicle are:
, A. Ligands that enter the nucleus.
B. Ligands that become the part of the plasma membrane.
C. Ligands that are used in cell communication.
D. Two of the above.
E. Part of the nuclear pore complex. - correct answer -C. Ligands that
are used in cell communication.
Draw a phospholipid and make sure the numbers of carbons are clearly
identified. - correct answer -
Heterochromatin does not exist in interphase nuclei. - correct answer -
FALSE
Naked DNA does not exist in Nature but scientists can make naked DNA
in a test tube. - correct answer -TRUE
Molecular motors run on which two cytoskeletal filament systems? -
correct answer -ACTIN FILAMENTS AND MICROTUBULES
