Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 8, Problem 5MCQ
Summary Introduction
Introduction:
Apoptosis is the programmed cell death that mostly occurs in multicellular organism. It is then coordinated event which dismantles a cell. It has two main functions in animals, first it eliminates excess cells and second it removes out aging or defective cell.
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Tumors involve a malfunction in this cellular process. a. transcription b. translation c. phagocytosis d. mitosis
A scientist notices that a cancer cell line fails to die when he adds an inducer of apoptosis to his culture of cells. Which hypothesis could explain why the cells fail to die? a. The cells have a mutation that prevents the initiation of apoptosis signaling. b. The cells have lost expression of the receptor for the apoptosis-inducing ligand. c. The cells overexpress a growth factor pathway that inhibits apoptosis. d. All of the above.
Identify which of the following statements is a lie?
Select one:
a. Apoptosis occurs as the body produces certain enzymes that initiate degradation of nuclear and cytoplasmic material, breaking the cell into necrosis bodies.
b. Apoptosis helps maintain a healthy and normal population of cells.
c. Apoptosis plays an essential role in growth, immune surveillance, and embryological development.
Chapter 8 Solutions
Biology: Concepts and Investigations
Ch. 8.1 - Explain the roles of mitotic cell division,...Ch. 8.1 - Prob. 2MCCh. 8.2 - Prob. 1MCCh. 8.2 - Prob. 2MCCh. 8.2 - Prob. 3MCCh. 8.2 - Prob. 4MCCh. 8.3 - Which cell types divide by binary fission?Ch. 8.3 - Prob. 2MCCh. 8.4 - Prob. 1MCCh. 8.4 - Prob. 2MC
Ch. 8.5 - Prob. 1MCCh. 8.5 - Prob. 2MCCh. 8.5 - Prob. 3MCCh. 8.5 - Prob. 4MCCh. 8.5 - Distinguish between mitosis and cytokinesis.Ch. 8.6 - Prob. 1MCCh. 8.6 - Prob. 2MCCh. 8.6 - Prob. 3MCCh. 8.6 - Prob. 4MCCh. 8.6 - Prob. 5MCCh. 8.7 - Prob. 1MCCh. 8.7 - Prob. 2MCCh. 8.8 - Prob. 1MCCh. 8.8 - Prob. 2MCCh. 8 - A DNA molecule is placed in a test tube containing...Ch. 8 - Prob. 2MCQCh. 8 - Prob. 3MCQCh. 8 - Prob. 4MCQCh. 8 - Prob. 5MCQCh. 8 - Prob. 1WIOCh. 8 - Write and explain an analogy for each of these DNA...Ch. 8 - Obtain a rubber band and twist it as m any times...Ch. 8 - Sketch and describe the events that occur when a...Ch. 8 - Prob. 5WIOCh. 8 - List the ways that binary fission is similar to...Ch. 8 - Prob. 7WIOCh. 8 - Prob. 8WIOCh. 8 - Prob. 9WIOCh. 8 - Prob. 1PITCh. 8 - Prob. 2PITCh. 8 - Prob. 3PIT
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- Which pathway supplies materials to lysosomes and is used to degrade obsolete parts of the cell? a. Phagocytosis b. Autophagy c. Apoptosis d. Necrosis e. Endocytosisarrow_forwardWhat is the name of the phenomenon in which a white blood cell engulfs a pathogen? Which cytoskeletal structures are involved in this process? a. phagocytosis and microtubules. b.phagocytosis and microfilaments. c. pinocytosis and microtubules d. d. pincytosis and microfilamentsarrow_forwardWhich of these is a characteristic of cancer cells? a. They do not exhibit contact inhibition. b. They lack specialization. c. They have abnormal chromosomes. d. They fail to undergo apoptosis. e. All of these are correct.arrow_forward
- For cellular transduction, why is it useful that phosphorylation cascades have a series of protein kinases? a. they amplify the original signal b. they always lead to the same cellular response c. the number of molecules used is small and fixed d. they are cell specificarrow_forwardCertain cells inhibit cell division by expressing signaling molecules on their surfaces. These molecules are MOST likely involved in which of these processes? A. Anchorage dependence B. Apoptosis C. Density- dependent Inhibition D. transformationarrow_forwardWhat is a primary function of tumor suppressor genes?a. stop all cells from dividingb. stop certain cells from dividingc. help oncogenes produce oncoproteinsd. allow the cell to skip certain phases of the cellcyclearrow_forward
- Which protein is a positive regulator that phosphorylates other proteins when activated? a. p53 b. retinoblastoma protein (Rb) c. cyclin d. cyclin-dependent kinase (Cdk)arrow_forwardWhat would be the most likely effect of a mutation that causes cyclin B to be unable to bind to CDK? a. Cells pass through the G2/M checkpoint and enter mitosis even when DNA has not been replicated. b. Cells never pass through the G1/S checkpoint. c. Cells pass through mitosis more quickly than nonmutated cells. d. Cells fail to pass through the G2/M checkpoint and do not enter mitosis.arrow_forwardSome types of cancers are treated with surgery, chemotherapy, stem cell replacement or radiation, similar to ultraviolet light. Why might it be beneficial to irradiate cancer cells? Choose the Best answer. A. it kills off all the cancer cells. B. it forces all cancer cells into G0 C. it will halt cell division and possibly be forced into apoptosis D. it could kill off the cancer cells, halt cell division or possibly force the cell into apoptosisarrow_forward
- Use an example to describe tumor suppressorsarrow_forwardWhat would be the effect on the following processes in a cancer cells treated with Drug X. Match the process with the likely effect of the drug. Protein Translation Apoptosis Cell Proliferation Production of new blood vessels A. Inhibited B. Activatedarrow_forwardWhich of the following proteins would least likely promote arrest of cell division or apoptosis? Select one: a. p21 b. superoxide c. retinoblastoma d. p53 e. cyclinarrow_forward
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