Biology: The Unity and Diversity of Life (MindTap Course List)
15th Edition
ISBN: 9781337408332
Author: Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher: Cengage Learning
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Textbook Question
Chapter 4, Problem 7SQ
What controls the passage of molecules into and out of the nucleus?
- a. endoplasmic reticulum, an extension of the nucleus
- b. nuclear pores,which consist of membrane proteins
- c. nucleoli, in which ribosome s.ubunits. are made
- d. dynamically assembled microtubules
- e. tight junctions
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Which functions are carried out by smooth endoplasmic reticulum?
A. Makes phospholipids and stores calcium
B. Breaks down cellular wastes and debris via enzymes
C. Modifies polypeptides and lipids then sorts and packages the finished products into vesicles
D. Folds and modifies proteins and polypeptides via surface ribosomes
Which is NOT true of eukaryotic cells? A) A true nucleus contains the DNA in the form of chromosomes. B) Eukaryotic cells contain membrane-bounded compartments or organelles. C) Their DNA employs a nucleoid area to produce proteins D) They all contain mitochondria E) They contain many organelles in the cytoplasm.
Which is NOT a general function of the cellular cytoskeleton?
A
Structural support for the cell
B
Assembly of DNA into chromatin
C
Regulation of intracellular transport
D
Separation of the chromosomes during mitosis
E
Regulation of cell motility and cellular contraction
Chapter 4 Solutions
Biology: The Unity and Diversity of Life (MindTap Course List)
Ch. 4 - Effects of Kartagener Syndrome An abnormal form of...Ch. 4 - All cells have these three things in common:...Ch. 4 - Which of the following is,not a principle of the...Ch. 4 - The surface-to-volume ratio _______. a. does not...Ch. 4 - A plasma membrane ________. a. controls exchanges...Ch. 4 - True or false? Ribosomes are only found in...Ch. 4 - Unlike eukaryotic cells, prokaryotic cells ______....Ch. 4 - What controls the passage of molecules into and...Ch. 4 - The main function of the endomembrane system is:...Ch. 4 - Enzymes. contalned in _______ break down worn-out...
Ch. 4 - Put the following structures in order according to...Ch. 4 - Which of the following statements is false? a. The...Ch. 4 - Prob. 12SQCh. 4 - Which of the following organelles contains no DNA?...Ch. 4 - No animal cell has a ___________. a. plasma...Ch. 4 - Prob. 15SQCh. 4 - Expalin the difference between cytosol and...Ch. 4 - In a classic episode of Star Trek, a gigantic...Ch. 4 - Prob. 3CTCh. 4 - What type or micrograph is shown below? Is the...
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- PREDICT Could a cell function if it were not enclosed by a selective barrier (i.e., a plasma membrane)?arrow_forwardWhich is not true of Eukaryotic cells? A) A true nucleus contains DNA in the form of chromosomes B) Eukaryotic cells contain membrane-bounded compartments or organelles C) Their Dna employs a nucleoid area to produce proteins D) Thye all contain mitochondria E) They contain specialized organelles in the cytoplasm Explain whyarrow_forwardAnswer the Guide Question: a) Each cell in an organism has all of the basic parts. Each has a function that benefits the other cells, how might the presence of different cell structures in plant and animal help them perform their functions as an organism. Explain. b) Why is the cell membrane considered as the guard of the cell? c) Why is the lysosome considered as the suicide bag of the cell?arrow_forward
- Which is incorrect about the plasma membrane? a. It has a hydrophobic interior and hydrophilic region that faces water. b. Cholesterol affects the fluid nature of the membrane. c. Proteins embedded in the lipid bilayer do not move. d. It surrounds all living cellsarrow_forwardWhat is the function of tight junctions? a. To allow cells to move b. To keep cells from moving c. To seal neighboring cells together and prevent leakage of d. extracellular molecules† e. To keep cancer cells together, forming a tumorarrow_forwardwhich of the following describes how RNA and DNA are used in mitosis? a. leads to the synthesis of proteins that assist in cell replication b. produce energy for cell division c. moves vesicles to the middle of the cell to form the cell plate d. forms spindle fibers that attach to chromosomesarrow_forward
- Which is NOT found in all cells? a. plasma membrane composed of phospholipids b. ribosomes c. DNA d. mitochondriaarrow_forwardIn eukaryotic cells, which occurs during the prophase of mitosis? A. appearance of the nuclear envelope B. breakup of the nuclear envelope C. replication of DNA D. separation of sister chromatids E. duplication of chromatidsarrow_forwardCreate a table the organelles, the cytoplasm, their location and their function a. mitochondria b. ribosome c. golgi bodies d. lysosomes e. Nucleus f. cytoplasmarrow_forward
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