BIOL-2126EL Lecture Notes - Lecture 15: Nuclear Pore, Protein Targeting, Nuclear Membrane
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i need help with this homwork please choose the correct answers and just be claer to read and understand for the slect the apply qusestions too and it is important i realy need the right answers so please be claer not write randomly i really need the correct answers to study for my test so hop you can help me
Question 1
What is the smallest cell you could find?
Mycoplasma |
Archaea |
Bacteria |
Cyanobacteria |
Question 2
TEMs appear as 3D images
True |
False |
Question 3
Bacteria are what cell type? Write one word as the answer in lowercase and using no syntax.
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Question 42 pts
ALL eukaryotic cells have which of the following. Click all that apply.
nucleoid |
cell membrane |
chloroplasts |
nucleus |
membrane enclosed cell organelles |
mitochondria |
Question 5
Prokaryotes and eukaryotes both have which if the following cellular components. Click all that apply.
ribosomes |
plasma membrane |
DNA |
nucleoid |
Question 6
I am made of one 60s and one 40s subunit, which organelle am I?
protein |
lipid |
bacterial ribosome Question 9 The difference between the rough and smooth ER is
Question 10 The site where many lipids, including cell membrane is produced.
Question 11 Name the organelle: In muscle cells in particular, I would increase in number and size in response to frequent exercise
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Question 12 In animal cells, glucose would be mobilized from its storage molecule (glycogen) in this part of the cell.
Question 13 Which of these is associated with the rough ER
Question 14 Which organelle sorts, modifies and stores substances produced on the rough ER. Write two words as the answer in lower case separated by a space. Question 15 Which organelle is responsible for ATP production. Write one word in the singular as the answer. Question 16 You inherit all of your mitochondria from your
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Question 27
What accounts for 40% of the protein in our bodies?
Fibers |
Cells |
Collagen |
Keratin |
Question 28
Animal cells have cell walls
True |
false |
QUESTION 30
The function of centrosome is:
1. | Microtubule initiation and organization in animal cells | |
2. | Organization of thin filaments | |
3. | Depolymerization of microtubules | |
4. | Organization of intermediate filaments |
2.5 points
QUESTION 31
The destinations of proteins synthesized on "free" ribomsomes include:
1. | Endoplasmic reticulum | |
2. | Nucleus | |
3. | Mitochondria | |
4. | Lysosomes |
2.5 points
QUESTION 32
Microtubules can be assembled and disassembled quickly in response to the cellular changes is because:
1. | Cells synthesize tubulin proteins very fast. | |
2. | Cells can turn other cytoskeletal filaments into microtubules | |
3. | Microtubules have an instable plus end and microtubules are probably organized by weak non-covalent interactions | |
4. | The motor proteins of microtubules can organize the microtubules in response to the cellular changes |
2.5 points
QUESTION 33
Both signal recognition particle and a translocon in rough endoplasmic reticulum membrane can recognize and bind to the signal sequence of a secretory protein, so they play the exact same role during protein co-translational translocation.
True
False
2.5 points
QUESTION 34
Rough endoplasmic reticulum is so named is because:
1. | It has many proteins associated with its surface. | |
2. | It has ribosomes associated with its cytosolic surface. | |
3. | It is associated with nuclear membrane. | |
4. | It has vesicles budding off its surface. |
2.5 points
QUESTION 35
The membrane vesicles that transport materials between membrane compartments have a protein coat. The protein coat has similar functions in different vesicles. These functions include:
1. | Help the enclosed material fold correctly. | |
2. | Help degrade the protein in the vesicles | |
3. | Maintain the internal pH of the vesicles | |
4. | Function as mechanical device to form a vesicle and select the components to be carried by a vesicle. |
2.5 points
QUESTION 36
Lysosomes are important for:
1. | Receptor-mediated endocytosis. | |
2. | Breaking down foreign particles brought into the cells by endosomes | |
3. | Regulating the process of organelle turnover. | |
4. | Protein trafficking between membrane compartments |
2.5 points
QUESTION 37
Which of the following is correct about membrane biosynthesis?
1. | Membranes are synthesized in Golgi Complex. | |
2. | Membranes arise from preexisting endoplasmic reticulum membranes. | |
3. | Membranes are synthesized on ribosomes. | |
4. | Membranes of all organelles have the same composition of proteins and lipids, since they all originate from endoplasmic reticulum. |
2.5 points
QUESTION 38
During skeletal muscle contractions, the shortening of the muscle fibers is because of:
The shortening of the thin and thick myofilaments. | ||
The shortening of the cytoskeletal filaments. | ||
The kinesin proteins moving over microtubules. | ||
The actin and myosin filaments sliding over each other. |
2.5 points
QUESTION 39
The assembly and disassembly of microtubules is regulated by rate of growth and shrinkage of the plus end.
True
False
2.5 points
QUESTION 40
The functions of Golgi complex include:
1. | O-linked oligosaccharides and most of a cellâs complex polysaccharides are assembled in Golgi complex | |
2. | Cis Golgi complex sorts proteins | |
3. | Trans Golgi complex segregates proteins in different types of vesicles for dilevery. | |
4. | N-linked oligosaccharides are further processed in Golgi complex |
Value: 1
Anabolic pathways of metabolism are pathways that:
a. build complex molecules from simple ones.
b. release stored chemical energy.
c. take place primarily in skeletal muscle
d. make large quantities of ATP.
Value: 2
The sum of all chemical reactions in a cell is referred to as _______________.
Value: 3
Organisms that derive both their energy and carbon from organic compounds are:
a. photoautotrophs.
b. chemoautotrophs.
c. chemoheterotrophs.
d. photoheterotrophs
Value: 4
It is often stated that the phosphate bonds in ATP are "high energy," but in fact, they are not notably high in energy. Rather, they are easy to break, and the âG of hydrolysis is a "useful" quantity of energy. What makes the phosphate bonds easy to break?
a. They are close to the destabilizing nitrogenous base adenosine
b. Positive charges on amino groups repel each other.
c. Negative charges on phosphate groups repel each other
d. High acidity attacks bonds between amino acids.
Value: 5
Which of the following describes ATP hydrolysis? Select all that apply
[mark all correct answers]
a. exergonic
b. spontaneous
c. often coupled to a reaction that has a positive ÎG
Value: 6
Which of the following describes catabolic reactions?
a. They are endergonic and have a negative change in free energy
b. They are exergonic and have a negative change in free energy
c. They are exergonic and have a positive change in free energy.
d. They are endergonic and have a positive change in free energy.
Value: 7
Why are cells not infinitely big?
a. Because they wouldn't fit in an organism
b. Because they would have a small surface area:volume ratio and substances would diffuse in and out too slowly
c. Because they would have a large surface area to volume ratio and substances would diffuse in and out too quickly
Value: 9
How is organelle movement around cells controlled?
a. the nucleus directs the movement of organelles in a cell
b. the cytoskeleton is like a monorail that moves organelles in a cell via motor proteins
c. organelles do not move, they have a fixed position in the cell
d. organelles move by facilitated diffusion in the cell
Value: 10
1. Prokaryotic cells lack:
a. a. A nucleus
b. organelles
c. cell membrane
d. DNA
e. A and B
Value: 11
Rough endoplasmic reticulum (rER)
a. a. Makes cell membranes
b. has ribosomes attached
c. are a site of protein synthesis
d. all of the above
Value: 12
Match the items.
The task is to match the lettered items with the correct numbered items. Appearing below is a list of lettered items. Following that is a list of numbered items. Each numbered item is followed by a drop-down. Select the letter in the drop down that best matches the numbered item with the lettered alternatives.
a. help to digest worn-out or damaged organelles. | |
b. Takes in molecules in transport vesicles, modifies them, and sends them back out in vesicles | |
c. makes sugar | |
d. makes ATP | |
e. assembles the ribosomes | |
f. gives the cell structure | |
g. move material around the cell | |
1. vesicles | a b c d e f g |
2. cytoskeleton | a b c d e f g |
3. the golgi apparatus | a b c d e f g |
4. lysosomes | a b c d e f g |
5. mitochondrion | a b c d e f g |
6. chloroplast | a b c d e f g |
7. nucleolus |