BIOLOGY 1A03 Lecture 3: Theme 1 Module 3
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Question 401 pts
Kinetic energy is the stored energy that can be used for motion.
True |
False |
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Question 411 pts
When an electron is transferred from one atom to another, and the two atoms are then electrically attracted to one another, a(n) ________________ bond is formed.
ionic |
kinetic |
covalent |
hydrogen |
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Question 421 pts
Changing the number of ____________ of an atom would change the chemical properties of the atom.
neutrons |
protons |
electrons |
electron shells |
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Question 431 pts
Forming molecules and breaking down molecules in biological organisms usually requires the use of _________ to help the reaction proceed faster.
oil |
heat |
enzymes |
blood |
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Question 441 pts
Organic molecules have a core composed of .
carbon |
nitrogen |
phosphorus |
hydrogen |
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Question 451 pts
The building blocks of carbohydrates are
polypeptides |
amino acids |
nucleotides |
monosaccharides |
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Question 461 pts
Water molecules crossing a membrane from high to low concentration is .
active transport |
cell fate |
facilitated diffusion |
osmosis |
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Question 471 pts
Choose the membrane molecule responsible for the passage of polar molecules and ions into and out of the cell.
phospholipids |
transmembrane channel proteins |
cell surface proteins |
carbohydrate chains |
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Question 481 pts
The simplest cells are .
prokaryotic |
animal cells |
eukaryotic |
cells of fungi |
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Question 491 pts
Which of the following membrane bound organelles are found inside bacterial cells:
nucleus |
organelles are not found in prokaryotic cells |
mitochondria |
chloroplasts |
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Question 501 pts
Which of the following is a specialized components of the cell, is associated with the rough endoplasmic reticulum, and is responsible for making proteins.
vacuoles |
ribosomes |
golgi complex |
nucleus |
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Question 511 pts
Proteins are sorted, modified, and packaged by the _____________ and later transported to the outside of the cell.
ribosomes |
golgi bodies (golgi apparatus) |
nucleus |
mitochondria |
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Question 521 pts
Dehydration synthesis is a process of linking two smaller subunits together to form a polymer. Which of the following statements below is true of dehydration synthesis?
Oxygen is consumed. |
A water molecule is removed from the molecules. |
A water molecule is added to the molecules |
Carbon dioxide is given off. |
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Question 531 pts
Proteins are made up of _________ held together by peptide bonds.
monomers |
monosaccharides |
polymers |
amino acids |
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Question 541 pts
Which of the following gives an amino acid its properties?
NH2 |
R Group or functional group |
COOH |
H |
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Question 551 pts
The final three-dimensional shape of a protein that includes the bonding of two or more polypeptide chains is call its _____ structure.
Tertiary |
Quaternary |
Secondary |
Primary |
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Question 561 pts
How do DNA and RNA differ?
all statements are differences between DNA and RNA. |
DNA is double stranded while RNA is single stranded. |
They have different sugars. |
Thymine is present in DNA but not in RNA. |
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Question 571 pts
Which of the following is a component of a DNA nucleotide?
phosphate |
a nitrogen containing base |
All are components of a nucleotide. |
5-carbon sugar |
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Question 581 pts
Cell membranes are made up of several different types of molecules. Select the membrane molecule below that is made up of a polar region and two non-polar fatty acid tails.
transmembrane proteins |
carbohydrate chains |
phospholipids |
cell surface proteins |
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Question 591 pts
Two organelles which are believed to have once been free-living bacterial cells are ____________ and ______________.
chloroplasts and mitochondria |
golgi apparatus and endoplasmic reticulum |
ribosomes and nucleolus |
peroxisomes and lysosomes |
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Question 601 pts
The is an extensive system of internal membranes responsible for producing carbohydrates and lipids.
smooth endoplasmic reticulum |
rough endoplasmic reticulum |
nucleolus |
mitochondria |
The vesicles that transport materials from donor membranes to acceptor membranes include:
1. | COP-II coated vesicles | |
2. | COP-III coated vesicles | |
3. | COP-I coated vesicles | |
4. | Clathrin coated vesicles |
2.5 points
QUESTION 11
During skeletal muscle contraction, the roles of ATP include:
1. | ATP is not required for forming the crossbridges between myosin and actin filaments. | |
2. | ATP is utilized as a structural linker to mediate the interaction between myosin and actin filaments | |
3. | Hydrolysis of ATP provides energy for myosin head to move along actin filaments and the binding of ATP to myosin head allows the detachment of myosin fromactin filaments. | |
4. | ATP binds to actin filaments to drive the power stroke of myosin head. |
2.5 points
QUESTION 12
One of the functions of smooth endoplasmic reticulum is
1. | Synthesizing steroid hormone in the endocrine cells of the gonad and adrenal cortex | |
2. | Serves as the starting point of the biosynthetic pathway | |
3. | Synthesizing secretory proteins | |
4. | Degrading cell debris |
2.5 points
QUESTION 13
The function of COP-II coated vesicles is mainly:
1. | Transporting materials from endosomes to Golgi complex | |
2. | Moving materials from the ER to the ERGIC and Golgi complex. | |
3. | Transporting materials from Golgi complex back to endoplasmic reticulum. | |
4. | Involved in receptor-mediated endocytosis. |
2.5 points
QUESTION 14
Which of the following processes is completed in rough endoplasmic reticulum?
1. | Chaperones help misfolded proteins fold correctly. | |
2. | Proteins that target to nucleus are synthesized in rough endoplasmic reticulum. | |
3. | O-linked glycosylation occurs in rough endoplasmic reticulum. | |
4. | Misfolded proteins are destructed in rough endoplamic reticulum. |
2.5 points
QUESTION 15
Kinesin is the motor protein that coorporates with microtubules. It has the following functions:
1. | It uses GTP as energy source. | |
2. | It can hydrolyze ATP and use the energy to drive cargo along microtubules from minus end to plus end. | |
3. | It has a globular head that can act as GTPase | |
4. | The tail of kinesin is more diverse and binds to cargo |
2.5 points
QUESTION 16
For correct segregation and trafficking, lysosomal proteins are tagged in the cis-Golgi with phosphorylated mannose residues, and then the tagged lysosomal enzymes are recruited to clathrin coated vesicles by mannose 6-phosphate receptors.
True
False
2.5 points
QUESTION 17
The process that specialized cells, such macrophages, engulf relatively large particles is:
1. | Called pinocytosis | |
2. | Called phagocytosis | |
3. | Mediated by COP-II coated vesicles | |
4. | Called autophagy |
2.5 points
QUESTION 18
Proteins synthesized on rough endoplasmic reticulum and smooth endoplasmic reticulum are imported co-translationally to their destinations
True
False
2.5 points
QUESTION 19
Treatment of cells with a drug that promotes microtubule disassembly disperses Golgi complex into separate stacks of membrane compartments, suggesting that:
1. | Golgi complex is made of microtubules. | |
2. | Microtubules are important for the organization of Golgi complex. | |
3. | Microtubules are transported into Golgi complex | |
4. | Golgi complex is composed of tubulin proteins |
2.5 points
QUESTION 20
Which of the following is correct about signal sequence of a secretory protein?
1. | It is an âaddress codesâ for protein trafficking pathways | |
2. | It is usually located at the C-terminus. | |
3. | It targets the ribosome and the protein that is being synthesized to endoplasmic reticulum. | |
4. | It is removed in Golgi complex. |