Homework Answers
19- B.
Calcium ions will enter through calcium channels
20-D.
Mitochondria is found both in plants and animals but not in bacteria.
21-C.
Cis face of Golgi complex lies towards nucleus and trans face lies towards plasma membrane.
23- A
Microtubules have microtubule organizing center.
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The concentration of Ca^2+ is greater outside a cell relative to inside. Which of the following...
of the three types of fibers; microfilaments (or and intermediate filaments are fibers with diameters in...
of the three types of fibers; microfilaments (or and intermediate filaments are fibers with diameters in a Microtubules are the filaments) are the middle range. Microtubules are hollow rods about 25 nm in diameter and 200 nm to 25 um in length. Microtubule fibers are constructed of the globular protein A tubulin dimer consists of two slightly different polypeptides: a-tubulin and B-tubulin. Microtubules shape and support the cell and serve as tracks to guide motor proteins carrving organelles to their...
Question 1 of 8 2.0 Points Which of the following statements about the cytoskeleton is false?...
Question 1 of 8 2.0 Points Which of the following statements about the cytoskeleton is false? A. The cytoskeleton is made up of three types of protein filaments. B. The cytoskeleton controls the location of organelles in eukaryotic cells. C. Covalent bonds between protein monomers hold together cytoskeletal filaments. D. The cytoskeleton of a cell can change in response to the environment. Reset Selection Question 2 of 8 2.0 Points Which of the following statements about the function of the...
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)...
Question 78 Which of the following statements about the cytoskeleton is TRUE? All eukaryotic cells have...
Question 78 Which of the following statements about the cytoskeleton is TRUE? All eukaryotic cells have actin, microtubules, and intermediate filaments in their cytoplasm The cytoskeleton provides a rigid and unchangeable structure important for the shape of the cell. The three cytoskeletal filaments perform distinct tasks in the cell and act completely independently of one another Actin filaments and microtubules have an inherent polarity, with a plus end that grows more quickly than the minus end С. D Question 79...
2. Short response (3pts each, 2 sentences max) A. Please rank the three cytoskeletal elements we ...
2. Short response (3pts each, 2 sentences max) A. Please rank the three cytoskeletal elements we have discussed from most to least flexible, AND describe how the assembled structure of these elements contributes to this property. Most flexible - - Least flexible B. What molecular feature(s) gives microtubules and actin fibers polarity? Microtubules - Actin fibers - C. Actin-based movement often involves changes in cell shape while cilia-based movement generally doesn't. Why? D. Please describe a function of intermediate filaments,...
Many drugs have the ability to disrupt the cytoskeletal structure of the cell. These drugs are...
Many drugs have the ability to disrupt the cytoskeletal structure of the cell. These drugs are useful in the study of microtubules and microfilaments. a. What are some of the drugs used to study microfilaments? b. What are some of the drugs used to study microtubules? c. What additional technique with applications similar to these drugs is often used to study the cytoskeleton? d. Cancer is a disease in which cells divide uncontrollably. Many of the drugs used in the...
Which of the following statements is false? Q 17-7 Homework Unanswered. Due in a day Which...
Which of the following statements is false?
Q 17-7 Homework Unanswered. Due in a day Which statement is FALSE? A Kinesins would be likely to move cargoes along microtubules toward the periphery of the cell o B A dynein would be the most likely motor protein to deliver a signal from the cell periphery to the nucleus O C Myosin I can control cell shape by pulling the plasma membrane along actin filaments D M yosin II promotes flagella movement...
1. You're shown a picture of a single cell with several mitotic spindles in anaphase. This...
1. You're shown a picture of a single cell with several mitotic spindles in anaphase. This image was probably obtained by interfering with the function of: A) microtubules. B) intermediate filaments. C) dynein. D) myosin. E) keratin. 2. During contraction of skeletal muscle: A) actin filaments are shortened. B) myosin filaments are lengthened. C) the sarcomere is pull apart. D) actin hydrolizes ATP. E) myosin and actin filaments interact. 3. "G proteins" are: A) proteins which contain a lot of...
QUESTION 5 are part of the cytoskeleton. They reinforce cell shape and anchor some cell organelles....
QUESTION 5 are part of the cytoskeleton. They reinforce cell shape and anchor some cell organelles. a. Microfilaments 1 point b. Microtubules c. Intermediate Filaments QUESTION 6 Which of the following would NOT be found in a prokaryotic cell? Oa. Nucleus 1 points b. Ribosome c. Capsule Od. Cell Wall QUESTION 7 1 points Sav are found in plants. They are channels between cells that are next to each other, and allow movement of water and sap between the cells....
QUESTION 1 A gene that encodes a protein that stimulates progression of the cell cycle is...
QUESTION 1 A gene that encodes a protein that stimulates progression of the cell cycle is known as a proto-oncogene. True False QUESTION 2 Cytokinesis occurs after which stage or phase of the cell cycle? a. G2 b. S c. G0 d. G1 e. M phase QUESTION 3 During cell-cycle checkpoints, protein kinases known as CDKs phosphorylate target proteins only when they associate with a cyclin. True False QUESTION 4 During mitosis, many of the spindle fibers attach to chromosomes...
of the three types of fibers; microfilaments (or and intermediate filaments are fibers with diameters in a Microtubules are the filaments) are the middle range. Microtubules are hollow rods about 25 nm in diameter and 200 nm to 25 um in length. Microtubule fibers are constructed of the globular protein A tubulin dimer consists of two slightly different polypeptides: a-tubulin and B-tubulin. Microtubules shape and support the cell and serve as tracks to guide motor proteins carrving organelles to their...
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)...
Question 78 Which of the following statements about the cytoskeleton is TRUE? All eukaryotic cells have actin, microtubules, and intermediate filaments in their cytoplasm The cytoskeleton provides a rigid and unchangeable structure important for the shape of the cell. The three cytoskeletal filaments perform distinct tasks in the cell and act completely independently of one another Actin filaments and microtubules have an inherent polarity, with a plus end that grows more quickly than the minus end С. D Question 79...
2. Short response (3pts each, 2 sentences max) A. Please rank the three cytoskeletal elements we have discussed from most to least flexible, AND describe how the assembled structure of these elements contributes to this property. Most flexible - - Least flexible B. What molecular feature(s) gives microtubules and actin fibers polarity? Microtubules - Actin fibers - C. Actin-based movement often involves changes in cell shape while cilia-based movement generally doesn't. Why? D. Please describe a function of intermediate filaments,...
Which of the following statements is false?
Q 17-7 Homework Unanswered. Due in a day Which statement is FALSE? A Kinesins would be likely to move cargoes along microtubules toward the periphery of the cell o B A dynein would be the most likely motor protein to deliver a signal from the cell periphery to the nucleus O C Myosin I can control cell shape by pulling the plasma membrane along actin filaments D M yosin II promotes flagella movement...
QUESTION 5 are part of the cytoskeleton. They reinforce cell shape and anchor some cell organelles. a. Microfilaments 1 point b. Microtubules c. Intermediate Filaments QUESTION 6 Which of the following would NOT be found in a prokaryotic cell? Oa. Nucleus 1 points b. Ribosome c. Capsule Od. Cell Wall QUESTION 7 1 points Sav are found in plants. They are channels between cells that are next to each other, and allow movement of water and sap between the cells....
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