Exam (elaborations)
Biology An Australian Focus Bruce Knox Pauline Ladiges Barbara Evans Robert Saint 5th Edition
- Course
- Institution
Biology An Australian Focus Bruce Knox Pauline Ladiges Barbara Evans Robert Saint 5th Edition
[Show more]
Seller
Follow
evileye251
Reviews received
Content preview
,Chapter 01 TestbankStudent: ___________________________________________________________________________
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.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller evileye251. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $26.73. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
80796 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now
Recently viewed by you
