Biology An Australian Focus Bruce Knox Pauline Ladiges Barbara Evans Robert Saint 5th Edition - Test Bank
4 mal angesehen 0 mal verkauft
Kurs
Biology - Test Bank
Hochschule
Biology - Test Bank
Chapter 01 Testbank
Student: ___________________________________________________________________________
1. When electrons in excited orbitals lose energy, that energy can A. be used to drive another chemical process.
B. emit light.
C. be passed on to a neighbouring atom.
D. All of the answers...
1. When electrons in excited orbitals lose energy, that energy can
A. be used to drive another chemical process.
B. emit light.
C. be passed on to a neighbouring atom.
D. All of the answers are correct.
E. be used to drive photosynthesis in a leaf cell in sunlight.
2. An oxygen atom has 8 protons, 8 neutrons and 8 electrons.
A. Its atomic number is 16.
B. Its mass number is 8.
C. It has 4 electrons in the first energy level (electron shell).
D. It has 6 electrons in the outermost energy level (electron shell).
E. It has 8 electrons in the outermost energy level (electron shell).
3. Atoms of the same element can exist in different forms called isotopes. The most common isotope of carbon is carbon-
12 but it has two less-common isotopes, carbon-13 and carbon-14. The less-common isotopes have
A. the same number of electrons but more protons.
B. the same number of protons but more neutrons.
C. the same number of neutrons but more protons.
D. the same number of protons but more electrons.
E. the same number of neutrons but more electrons.
,4. Ionic bonds are formed by the
A. attraction between atoms with opposite polarity.
B. transfer of electrons from one atom to another.
C. sharing of electrons between oppositely charged ions.
D. attraction between positively and negatively charged ions of the same element.
E. sharing of electrons in the outer electron orbital of an atom.
5. Hydrogen bonds can form between
A. carbon and hydrogen atoms.
B. oxygen and hydrogen atoms in the same water molecule.
C. oxygen and hydrogen atoms in adjacent molecules.
D. hydrogen atoms in adjacent molecules.
E. hydrogen atoms within the same molecule.
6. One of the properties that make water an ideal medium for living organisms is that water
A. can absorb considerable amounts of heat with little change in temperature.
B. expands and becomes more dense as it changes from solid to liquid form.
C. releases heat when it evaporates.
D. is a universal solvent.
E. has a high boiling point.
7. Hydrogen bonding between water molecules gives water a high level of structural organisation. In ice, the maximum
number of hydrogen bonds formed with one water molecule is
A. 2.
B. 3.
C. 4.
D. 6.
E. 1.
, 8. Water is a versatile solvent because water molecules are
A. small.
B. polar.
C. hydrophilic.
D. loosely connected by hydrogen bonds.
E. hydrophobic.
9. Which of the following statements is CORRECT?
A. The internal pH of the cells of an organism is usually the same as the pH of the external environment.
B. The internal pH of the cells of an organism may be quite different to the pH of the external environment.
C. Regardless of the internal pH of their cells, most living organisms can only survive within a narrow range of
environmental pH.
D. Regardless of the pH of the environment, most living organisms will not survive if the internal pH of their cells
fluctuates.
E. The internal pH of a muscle cell may become more basic during exercise.
10. The interior of a lysosome in an animal cell has a pH of 5, while the cytosol of the cell has a pH of 7.4. This indicates
that in comparison to the cytosol, the interior of the lysosome has a
A. lower concentration of total dissolved ions.
B. lower concentration of hydrogen ions.
C. higher concentration of bicarbonate ions.
D. higher concentration of hydrogen ions.
E. higher concentration of hydroxyl ions.
11. Buffers are substances that assist cells and organisms to resist changes in pH by
A. accepting H+ ions as pH rises and releasing H+ ions as pH falls.
B. accepting OH– ions as pH rises and releasing H+ ions as pH falls.
C. accepting H+ ions as pH falls and releasing H+ ions as pH rises.
D. accepting OH– ions as pH falls and releasing H+ ions as pH rises.
E. accepting OH- ions as pH falls and releasing OH- ions as pH rises.
Alle Vorteile der Zusammenfassungen von Stuvia auf einen Blick:
Garantiert gute Qualität durch Reviews
Stuvia Verkäufer haben mehr als 700.000 Zusammenfassungen beurteilt. Deshalb weißt du dass du das beste Dokument kaufst.
Schnell und einfach kaufen
Man bezahlt schnell und einfach mit iDeal, Kreditkarte oder Stuvia-Kredit für die Zusammenfassungen. Man braucht keine Mitgliedschaft.
Konzentration auf den Kern der Sache
Deine Mitstudenten schreiben die Zusammenfassungen. Deshalb enthalten die Zusammenfassungen immer aktuelle, zuverlässige und up-to-date Informationen. Damit kommst du schnell zum Kern der Sache.
Häufig gestellte Fragen
Was bekomme ich, wenn ich dieses Dokument kaufe?
Du erhältst eine PDF-Datei, die sofort nach dem Kauf verfügbar ist. Das gekaufte Dokument ist jederzeit, überall und unbegrenzt über dein Profil zugänglich.
Zufriedenheitsgarantie: Wie funktioniert das?
Unsere Zufriedenheitsgarantie sorgt dafür, dass du immer eine Lernunterlage findest, die zu dir passt. Du füllst ein Formular aus und unser Kundendienstteam kümmert sich um den Rest.
Wem kaufe ich diese Zusammenfassung ab?
Stuvia ist ein Marktplatz, du kaufst dieses Dokument also nicht von uns, sondern vom Verkäufer ExamsExpert. Stuvia erleichtert die Zahlung an den Verkäufer.
Werde ich an ein Abonnement gebunden sein?
Nein, du kaufst diese Zusammenfassung nur für 22,28 €. Du bist nach deinem Kauf an nichts gebunden.
