WorksheetsCell Structure and Function
Total questions: 10
Worksheet time: 10mins
Why is it important to administer an antiviral agent to an infected person within 48 hours of the appearance of symptoms?
The H1N1 virus is dormant in cells
The H1N1 virus replicates quickly
The H1N1 virus does not mutate
The H1N1 virus is transmitted through a vector host, such as a mosquito
In the 1880s, Louis Pasteur developed a method of weakening viruses. The weakened viruses could be injected into healthy individuals. How is this method effective in fighting viral diseases?
The immune system develops antibodies in response to the weakened viruses.
The weakened viruses attach to unaffected viruses in the host and interrupt the viral reproductive cycle.
The rate of genetic mutation in the host is decreased due to the introduction of the weakened viruses.
Weakened viruses are unable to enter the host organism.
In the early 1900s a scientist hypothesized a link between DNA and the production of proteins in the cytoplasm. However, the fact that DNA could not be found outside the nucleus led scientist to believe that another substance was also involved in the synthesis of protein in the cytoplasm. in the 1940s scientists performed an experiment that ultimately identified the site of protein synthesis. They also identified the molecule responsible for transporting information from the nucleus to the site of protein synthesis. What was this newly identified molecule?
A gene
mRNA
ATP
Thymine
Which molecule synthesized by plants is a major source of energy for cellular processes in both plants and animals?
Wax
Nucleic Acid
Glucose
Chlorophyll
When mammals get an infection, their internal body temperature often rises 2 to 3 degrees Celsius. The body gets the energy it needs to react to an infection by
increasing the rate of cellular division
decreasing the rate of glucose movement into the cell
increasing the rate of cellular respiration in mitochondria
decreasing the rate at which carbon dioxide is removed from the cell
In 1918 influenza epidemic killed between 50 million and 100 million people worldwide. This epidemic happened near the end of World War I. More people died from the influenza epidemic than were killed in the war. Which of the following explains why the virus was so deadly worldwide?
Infected soldiers returning from war spread the virus when they coughed.
Food was scarce because of the war, so people were undernourished, and their immune systems were weakened.
Medical personnel often became ill as a result of exposure to the airborne virus particles.
All of the above
Which of these describes a difference between viruses and cells?
Cells contain protein, and viruses contain only carbohydrates.
Viruses have flagella, and cells have only cilia.
Cell reproduce independently, and viruses require a host to reproduce.
Viruses have membranes made of proteins, and cells have membranes made of nucleic acid.
The human immunodeficiency virus (HIV) often infects and destroys CD4 T cells. These CD4 T cells are one of many kinds of white blood cells that are an important part of the immune system. The most common danger related to the destruction of CD4 T cells is
an increase in the risk of high blood pressure.
an increase in the threat of diseases cause by microorganisms and viruses.
a decrease in the flow of blood to vital organs.
a decrease in the amount of oxygen being transported to the tissues.
Which of these statements best explains the process of energy conversion that takes place in the mitochondria?
Energy is required for carbon dioxide molecules to form six-carbon sugar molecules
Water molecules and radiant energy are necessary for anaerobic respiration to take place.
Oxygen molecules release energy in the form of heat during combustion reactions.
The energy in the bonds of glucose molecules is transferred to the phosphate bonds in ATP.
What is the difference in the function of the glycoprotein structures of an HIV virion and the cilia of an animal cell?
The glycoprotein structures are used for attachment, and the cilia are used to move fluids surrounding the cell.
The glycoprotein structures are used to obtain nutrition, and the cilia are used to secrete proteins.
The glycoprotein structures are used to provide support for the viral envelope, and the cilia strengthen the cell membrane.
The glycoprotein structures are used for defense, and the cilia are used for locomotion.
