Homework Answers
Answer- The ability of cells to swim in liquid
Microtubules are the proteins which are part of cytoskeletal elements. They are made up of alpha and beta tubulin subunits. They are hollow cylindrical rods. They are mainly involved in following functions-
1. They are mechanical support system in the cell and hold organelles
2. They are involved in skeletal muscle contraction
3. They help in cargo transport through vesicles
4. They are involved in chromosomal segregation during cell division
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Microtubule motor proteins are involved in all of the following EXCEPT: O positioning of organelles within...
Question 40 (2 points) Myosin motor proteins use ATP to: carry vesicles along a microtubule within...
Question 40 (2 points) Myosin motor proteins use ATP to: carry vesicles along a microtubule within a cell in a minus-to-plus direction. carry vesicles along a microfilament within a cell in a minus-to-plus direction. slide along intermediate filaments to contract muscle cells.
Proteins play all of the following roles except:
Proteins play all of the following roles except: Receptors for signal transduction Enzymatic activity Intercellular joining (between cells) Genetic information Cell-cell recognition
Question 13 Cells and all organelles within a cell are wrapped in a lipid bilayer membrane...
Question 13 Cells and all organelles within a cell are wrapped in a lipid bilayer membrane What is the purpose of the membrane? 1. To facilitate transcription and translation of new proteins 2. To permanently stop the movement of molecules from one area to another 3. To catalyze chemical reactions 4. To compartmentalize chemical reactions
Which of the following is NOT a function of proteins? Select one: O a. communicating between...
Which of the following is NOT a function of proteins? Select one: O a. communicating between cells O b. catalyzing reactions O c. providing structure to the cell O d. long term energy storage e. movement and transport within cells
All of the following are involved in neuromuscular transmission EXCEPT Select one: a. An increase in...
All of the following are involved in neuromuscular transmission EXCEPT Select one: a. An increase in the permeability of the motor end plate membrane to Na+ and K+. b. An influx of Ca2+ into the motor axon terminal. c. Binding of acetylcholine to receptors on the motor end plate membrane. d. Depolarisation of the the muscle membrane adjacent to the motor end plate. e. Re-uptake of acetylcholine into the motor axon terminal.
The liver is involved in detoxification of many poisons and drugs. Which of the following structures...
The liver is involved in detoxification of many poisons and drugs. Which of the following structures is primarily involved in this process and therefore abundant in liver cells? A) rough ER B) smooth ER C) Golgi apparatus D) nuclear envelope E) transport vesicles Which of the following produces and modifies polysaccharides that will be secreted? A) lysosome B) vacuole C) mitochondrion D) Golgi apparatus E) peroxisome Which organelle often takes up much of the volume of a plant cell? A)...
all 3? Which statement about muscle contractions is false? O An action potential in the muscle...
all 3?
Which statement about muscle contractions is false? O An action potential in the muscle cell activates contraction by releasing Car within the muscle. O A single action potential at the neuromuscular junction is sufficient to cause a muscle to twitch. O Summation of twitches leads to a graded increase in the tension that can be generated by a single muscle fiber. The tension generated by a muscle can be varied by controlling how many of its motor units...
When the sympathetic nervous system is activated, you would expect all of the following responses EXCEPT......
When the sympathetic nervous system is activated, you would expect all of the following responses EXCEPT... Select one: O a. contraction of radial ocular muscle. (Contraction of this muscle would dilate the pupil.) b. vasodilation in skeletal muscle. c. insulin secretion. (Insulin is the hormone responsible for reducing blood glucose levels by moving glucose into cells for storage.) d. inhibition of intestinal peristalsis. (Peristalsis is the muscular movements that propel food through the digestive tract.)
The enzyme-coupled receptor pathway involves all of the following EXCEPT: second messengers Okinases O G proteins...
The enzyme-coupled receptor pathway involves all of the following EXCEPT: second messengers Okinases O G proteins O proteins with SH2 domains
QUESTION 1 A pregnant teenager is at a greater risk of all of the following except:...
QUESTION 1 A pregnant teenager is at a greater risk of all of the following except: Having a stillbirth O Having a premature birth O Maternal death O Having a low birthweight baby QUESTION 2 Vitamin A plays a critical role in all of the following roles except: O Eye health O Immune function Protective linings of all epithelial cells Blood clotting QUESTION 3 How much weight should a teen gain during pregnancy? O Approximately 25 pounds O Approximately 35...
Question 40 (2 points) Myosin motor proteins use ATP to: carry vesicles along a microtubule within a cell in a minus-to-plus direction. carry vesicles along a microfilament within a cell in a minus-to-plus direction. slide along intermediate filaments to contract muscle cells.
Question 13 Cells and all organelles within a cell are wrapped in a lipid bilayer membrane What is the purpose of the membrane? 1. To facilitate transcription and translation of new proteins 2. To permanently stop the movement of molecules from one area to another 3. To catalyze chemical reactions 4. To compartmentalize chemical reactions
Which of the following is NOT a function of proteins? Select one: O a. communicating between cells O b. catalyzing reactions O c. providing structure to the cell O d. long term energy storage e. movement and transport within cells
The liver is involved in detoxification of many poisons and drugs. Which of the following structures is primarily involved in this process and therefore abundant in liver cells? A) rough ER B) smooth ER C) Golgi apparatus D) nuclear envelope E) transport vesicles Which of the following produces and modifies polysaccharides that will be secreted? A) lysosome B) vacuole C) mitochondrion D) Golgi apparatus E) peroxisome Which organelle often takes up much of the volume of a plant cell? A)...
all 3?
Which statement about muscle contractions is false? O An action potential in the muscle cell activates contraction by releasing Car within the muscle. O A single action potential at the neuromuscular junction is sufficient to cause a muscle to twitch. O Summation of twitches leads to a graded increase in the tension that can be generated by a single muscle fiber. The tension generated by a muscle can be varied by controlling how many of its motor units...
When the sympathetic nervous system is activated, you would expect all of the following responses EXCEPT... Select one: O a. contraction of radial ocular muscle. (Contraction of this muscle would dilate the pupil.) b. vasodilation in skeletal muscle. c. insulin secretion. (Insulin is the hormone responsible for reducing blood glucose levels by moving glucose into cells for storage.) d. inhibition of intestinal peristalsis. (Peristalsis is the muscular movements that propel food through the digestive tract.)
The enzyme-coupled receptor pathway involves all of the following EXCEPT: second messengers Okinases O G proteins O proteins with SH2 domains
QUESTION 1 A pregnant teenager is at a greater risk of all of the following except: Having a stillbirth O Having a premature birth O Maternal death O Having a low birthweight baby QUESTION 2 Vitamin A plays a critical role in all of the following roles except: O Eye health O Immune function Protective linings of all epithelial cells Blood clotting QUESTION 3 How much weight should a teen gain during pregnancy? O Approximately 25 pounds O Approximately 35...
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