Q & A - Science

Q & A

• Suppose you build a capacitor from two metal plates each of area square centimeters The plates are separated by cm of vacuum What voltage battery should you connect to the capacitor to cause it to s Suppose you build a capacitor from two metal plates each of area  square centimeters The plates are separated by  cm of vacuum What voltage battery should you connect to ...
• Problem If you poke a hole in a container full of gas the gas will start leaking out In this problem you will make a rough estimate of the rate at which gas escapes through a hole This process is cal Problem If you poke a hole in a container full of gas the gas will start leaking out  In this problem you will make a rough estimate of the rate at which gas escapes thro...
• A projectile is shot at an angle of degree from the horizontal with the speed ofof How far will it travel in the horizontal direction before hits the ground again A projectile is shot at an angle of degree from the horizontal with the speed ofof How far will it travel in the horizontal direction before hits the ground again
• Questions Define osmosis How did you observe osmosis in Exercise List molar concentrations at which water entered the potato strips Why did water move into the potato strips Were these solutions hypo Questions Define osmosis How did you observe osmosis in Exercise List molar concentrations  at which water entered the potato strips Why did water move into the potato st...
• In an experiment an electron is prepared in the state described by the wavefunction where is the time from the start of each run of the experiment n this experiment the momentum is measured at a spe  In an experiment an electron is prepared in the state described by the wavefunction where  is the time from the start of each run of the experiment n this experiment the...
• Assume the electron to be free calculate the total number of states below in a cubical box of volume Assume the electron to be free calculate the total number of states below in a cubical box of volume 
• Which of the following is false regarding how a differentiation strategy can help a firm Which of the following is false regarding how a differentiation strategy can help a firm to improve its competitive position vis à vis Porters five forces? (A) By incre...
• Primary value chain activities that involve the effective layout of receiving dock operati Primary value chain activities that involve the effective layout of receiving dock operations (inbound logistics) and support value chain activities that include expertis...
• Viruses and bacteria are the only infectious agents found in plants and animals Viruses and bacteria are the only infectious agents found in plants and animals. (A) True (B) False
• HIV binds to the human white blood cell receptor protein CD4 HIV binds to the human white blood cell receptor protein CD4. (A) True (B) False
• Some viruses enter the cell through endocytosis Some viruses enter the cell through endocytosis. (A) True (B) False
• The HIV virus uses the host cell's reverse transcriptase to manufacture DNA The HIV virus uses the host cells reverse transcriptase to manufacture DNA. (A) True (B) False
• New strains of influenza continually arise because the virus mutates and recombines the New strains of influenza continually arise because the virus mutates and recombines the gene encoding the protein that makes it resistant to antibodies. (A) True (B) False
• Viruses are more closely related to chemical matter than to a living organism Viruses are more closely related to chemical matter than to a living organism. (A) True (B) False
• Of the viruses listed below, the most lethal is Of the viruses listed below, the most lethal is (A) Influenza (B) Ebola (C) Measles (D) Herpes simplex (E) Epstein-Barr
• When a virus kills the infected host cell in which it is replicating, the reproductive When a virus kills the infected host cell in which it is replicating, the reproductive cycle is called a ________ cycle. (A) Lysogenic (B) Phagocytic (C) Lytic (D...
• causes the host cell to synthesize a double strand of DNA complementary to the viral RNA The viral enzyme, _________, causes the host cell to synthesize a double strand of DNA complementary to the viral RNA. (A) Reverse transcriptase (B) Chemokinase (C)...
• In AIDS patients, the virus homes in on the In AIDS patients, the virus homes in on the _______________ T cells. (A) CD1 (B) CD2 (C) CD3 (D) CD4 (E) CD5
• Typically, viruses form Typically, viruses form _______________ around their nucleic acid. (A) An envelope (B) A cell wall (C) A capsid (D) A cell membrane (E) A capsule
• Persons infected with HIV may not develop AIDS because the virus has the Persons infected with HIV may not develop AIDS because the virus has the ________ gene. (A) CAF (B) gag (C) pol (D) nef (E) env
• Which of the following is not a viral disease Which of the following is not a viral disease? (A) Mumps (B) Measles (C) Chicken pox (D) Rubella (E) Diphtheria
• Viruses that cause lysis in host cells are called Viruses that cause lysis in host cells are called (A) Temperate viruses (B) Phagocytic viruses (C) Prions (D) Virulent viruses (E) Infectious viruses
• are small naked fragments of RNA that infect plant cells __________ are small naked fragments of RNA that infect plant cells. (A) Prions (B) Nucleons (C) Prophages (D) Macrophages (E) Viroids
• The only structural pattern that has been found among isometric viruses is The only structural pattern that has been found among isometric viruses is (A) Icosahedral (B) Spherical (C) Helical (D) Tetrahedral (E) Capsular
• Each HIV particle possesses a glycoprotein called Each HIV particle possesses a glycoprotein called __________ on its surface (A) CD4 (B) gp120 (C) CXCR4 (D) gp8 (E) nef
• When a bacteriophage is integrated into a cellular genome it is called a When a bacteriophage is integrated into a cellular genome it is called a (A) Virulent virus (B) Lytic virus (C) Prophage (D) Transducing virus (E) Microphage
• The CD8+ cell antiviral factor (CAF) is used to The CD8 cell antiviral factor (CAF) is used to (A) Block the CCR5 receptor (B) Disable the CXCR4 receptor (C) Block replication of the HIV virus (D) Mutate the CC...
• The genetic alteration of a cell's genome is called The genetic alteration of a cells genome is called (A) Transformation (B) Reverse transcription (C) Genome conversion (D) Invasion
• The separation of the Archaebacteria into a separate domain indicates The separation of the Archaebacteria into a separate domain indicates (A) That these organisms are very different from eubacteria and from eukaryotes (B) That organis...
• A cladogram conveys information about ancestors and descendants of an organism A cladogram conveys information about ancestors and descendants of an organism. (A) True (B) False
• Biologists currently recognize three kingdoms: Plants, Animals, and Protists Biologists currently recognize three kingdoms: Plants, Animals, and Protists. (A) True (B) False
• The scientific name is derived from the genus and species to which an organism belongs The scientific name is derived from the genus and species to which an organism belongs. (A) True (B) False
• Polynomial classification has recently begun to replace the binomial system Polynomial classification has recently begun to replace the binomial system. (A) True (B) False
• Cladistic taxonomy places the birds as Archosaurs, along with the Cladistic taxonomy places the birds as Archosaurs, along with the: (A) Mammals (B) Crocodilians (C) Turtles (D) Snakes (E) None of the above
• At the present time, scientists have named approximately At the present time, scientists have named approximately ____ species. (A) 100,000 (B) 500,000 (C) 1,000,000 (D) 1,500,000 (E) 10,000,000
• Which one of the following sequences shows the correct hierarchy of classification Which one of the following sequences shows the correct hierarchy of classification, going from the most inclusive to the least inclusive? (A) Kingdom, Domain, Phylum, O...
• The binomial system of classification was developed by The binomial system of classification was developed by: (A) Darwin (B) Wallace (C) Linnaeus (D) Malthus (E) none of the above
• Modern biologists prefer to perceive the phylogenetic tree of organisms as multibranched Modern biologists prefer to perceive the phylogenetic tree of organisms as multibranched, rather than linear, with no particular species being "higher", or superior, to a...
• A taxon consisting of the most closely related species is called A taxon consisting of the most closely related species is called a(n) ________________. (A) Family (B) Order (C) Genus (D) Phylum
• Throughout the world, official species names are in Throughout the world, official species names are in (A) Latin (B) Greek (C) English (D) French (E) The native language
• Multicellular organisms and unicellular yeasts are contained in Multicellular organisms and unicellular yeasts are contained in (A) Animalia (B) Plantae (C) Protista (D) Fungi (E) Eubacteria
• The oldest level of taxonomic classification is The oldest level of taxonomic classification is (A) Class (B) Family (C) Genus (D) Phylum (E) Species
• Characteristics that have arisen as a result of common evolutionary descent are said to be Characteristics that have arisen as a result of common evolutionary descent are said to be (A) Analogous (B) Homogenous (C) Heterogamous (D) Homologous (E) Contiguous
• In printing scientific names, it is conventional for only the In printing scientific names, it is conventional for only the _______________ to be underlined or italicized. (A) Binomial (B) Genus (C) Species (D) Division (E) Kingdom
• In the early 1700's, the classification system used was In the early 1700s, the classification system used was (A) Polynomial (B) Pentanomial (C) Binomial (D) Tetranomial (E) Trinomial
• In printed scientific names, only the In printed scientific names, only the _______________ is capitalized. (A) Family (B) Class (C) Species (D) Kingdom (E) Genus
• In plant taxonomy, a division is the equivalent to In plant taxonomy, a division is the equivalent to _______________ . (A) Family (B) Order (C) Class (D) Phylum (E) Kingdom
• In the current taxonomic system, families are grouped into In the current taxonomic system, families are grouped into (A) Vlasses (B) Phyla (C) Orders (D) Divisions (E) Kingdoms
• When writing species epithets, it is sometimes permissible to abbreviate the When writing species epithets, it is sometimes permissible to abbreviate the _______________ name. (A) Species (B) Phylum (C) Order (D) Family (E) Genus
• The plant alternation of generations is characterized by The plant alternation of generations is characterized by _______________ meiosis. (A) Zygotic (B) Somatic (C) Sporic (D) Generic (E) Gametic