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Biology 1100 Exam 1 Review
Biology 1100 Exam 1 Review
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A Study Guide for Exam 1 of Biology 1100. This covers Chapters 1-3
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1
Theplasma membrane is
Hydrophilic fats and hydrophobic proteins
Cell wall proteins attached to a layer of lipids
Cholesterol and protein in layers
A fluid mosaic of proteins and aphospholipid bilayer
2
How many electron pairs does carbon sharein order to complete its valence shell?
1
3
2
4
3
What kinds of molecules pass through acell membrane most easily?
ionic
small and hydrophobic
large and hydrophobic
large polar
4
Which of the following could not be tested scientifically?
Are hurricanes becoming more frequent?
Which Da Vinci painting is the most beautiful?
Do mobile phones cause brain cancer?
Can astrology help you make money in the stock market?
5
6) Protists and bacteria are grouped into different domainsbecause
A) protists eat bacteria.
protists havemembrane-bounded nucleus, bacterial cells lack.
E) protists are photosynthetic.
D) bacteria decompose protists.
6
Osmosis is a special case of diffusion inwhich what diffuses across a membrane?
Carbon dioxide
Osmium
Oxygen
Water
7
How do peptides and other molecules enterand leave the Golgi apparatus?
Proteins move laterally through thephospholipid bilayer.
Transport vesicles fuse w 1 side of Golgi + leave fromother
Proteins movethrough the cytoplasm
Ribosomes shuttle proteins back andforth.
8
Which particles are not found in thenucleus?
Electrons
Ions
Neutrons;Electrons
Protons;Electrons
9
cells release CO2 into blood. effect on pH of blood as blood comes in contct w/ respiringcells?
Blood pH 1st increase,decrease as CO2 combo w/ hemoglobin.
Blood pH will remain unchanged.
Blood pH will increase slightly.
Blood pH will decrease slightly.
10
TEM can resolve bio img tothe subnanometerlvl, as opposed to super-resolution light microscope?
focal length of the electron microscope is longer.
Electronbeams much shorter wavelengths than visible light.
Contrast is enhanced by staining withatoms of heavy metal.
The electron microscope cannot imagewhole cells at one time.
11
All of the following contain amino acids except
antibodies.
most enzymes.
cholesterol.
hemoglobin.
12
organelle or structureprimarily involved in synthesis of oils, phospholipids, and steroids?
mitochondrion
ribosome
lysosome
smoothendoplasmic reticulum
13
Knowing just the atomic mass of an element tells us about which of the following?
the number of neutrons in the element
the number of protons in the element
the chemical properties of the element
the number of protons plus neutrons in the element
14
A controlled experiment is one in which
2 groups, 1 does not receive the experimental treatment.
one group for which the scientist controls all variables.
A) the experiment repeated to ensureresults are accurate.
least two groups, one differing from theother variables.
15
Lactose is composed of 1 glucose m-cule joinedto 1 galactosem-cule. How is lactose classified?
as a disaccharide
asa pentose
asa hexose
as a monosaccharide
16
"hydrogenated vegetable oil" is a major ingredient. What is the result of adding H tov-oil?
The hydrogenated vegetable oil has alower melting point.
Thehydrogenated vegetable oil has fewer trans-fatty acids
Hydrogenated vegetable oil stayssolid at room temperature.
Hydrogenated vegetable oil is less likely to clog arteries.
17
Which of the following is a falsestatement concerning amino groups?
They contain nitrogen.
They are nonpolar.
They are basic in pH.
Theyare found in amino acids.
18
A cell with manyribosomes ismost likely
digesting large food particles.
producing primarily lipids.
producingprimarily proteins.
constructingan extensive cell wall or extracellular matrix.
19
Onfood packages, to what does the term insoluble fiberrefer?
amylopectin
polypeptides
starch
cellulose
20
If the pH of a solution is decreased from9 to 8, it means that the
concentrationof phosphatehas decreased.
concentration of H+ has decreased fromwhat itwas at pH 9.
concentration of acidshas decreased.
concentrationof H+ has increased fromwhatit was at pH 9.
21
What type of bond results from sharingof electrons between atoms?
a covalentbond
a weak bond
anionic bond
a hydrogen bond
22
Based on your knowledge of the polarityof water molecules, the solute molecule depicted here is
without charge.
positively charged.
hydrophobic.
negativelycharged.
23
Which of the following statements is truefor the class of biological molecules known as lipids?
They are made from glycerol, fatty acids,and phosphate.
They are not synthesized by enzymes.
Theycontain less energy than proteins and carbohydrates.
They are insoluble in water.
24
Prokaryotesare classified as belonging to two different domains. What are the domains?
C) Eukarya and Monera
B) Archaea and Monera
A) Bacteria and Eukarya
E) Bacteria and Archaea
25
Water molecules are able to form hydrogenbonds with
oxygen gas (O2) molecules
compounds that have ionicbonds
compounds that have ionic bonds AND sugars
sugars
26
Molybdenum hasan atomic number of 42. Therefore,which of the following can be true?
Isotopes of molybdenum have differentelectron configs.
The isotopes of molybdenum have between 92and 100 protons.
Isotopes of molybdenum can have between 50 and 58 protons.
Molybdenum atoms can have between 50 and58 neutrons.
27
Which of the following statements is true?
all org require the same elements in the same quant.
All the elements are required by living organisms.
C, H, O, & Nare the most abundant elements of living matter.
Iron is an example of an element not needed by living cells.
28
mycoplasma diameter 0.1 Whatdoes the organism's size tell you about how it might be classified?
Itcould be almost any typical bacterium.
It must be a single-celled protist.
It must be a single-celled fungus.
It could be a very small bacterium.
29
A scientific theory differs from a hypothesis in that a theory:
Is at least 100 years old
Is backed by years of research by many scientists
Is a best guess about what is happening
Cannot be disproven
30
The partial negative charge in a moleculeof water occurs because
O atom-2 pairs ofe in valnce shell;arn't neutralized by H
the oxygen atom acquires an additionalelectron.
e shared w/ O + H atoms spend O atom nucleus than H atom nuc
1 of the H atoms donates anelectron to the oxygen atom.
31
Hydrophobic substances such as vegetableoil are
nonpolar substances that repel watermolecules.
polar substances that have an affinityfor water.
nonpolar substances that have attraction 4 water molecules.
polar substances that repel watermolecules.
32
every 50 yrs ppl over 6 ft tall are gone b4 reproduce. The avg height of the human popwill
B) gradually decline.
D) gradually increase.
C) rapidly decline.
A) remain unchanged.
33
Which of the following statements bestdescribes the carbon atoms present in a seed-eating bird?
Theywere processed into sugars through photosynthesis.
All statements describe the presence of carbon atoms
They are ultimately derived from carbon dioxide.
Theywere incorporated into organic molecules by plants.
34
Whichcell organelle is considered the “recycling center” of the cell?
the lysosome
the Golgi apparatus
the endoplasmic reticulum
mitochondria
35
Water passes quickly through cellmembranes because
it moves through aquaporins inthe membrane.
it moves through hydrophobic channels.
the bilayer is hydrophilic.
water movement is tied to ATP hydrolysis.
36
Aminoacids are acids because they always possess which functional group?
phosphate
methyl
amino
carboxyl
37
What are archaea?
D) Plant-like organisms.Can live only in extrm saltenviron.
Prokaryotescharacterized as extremophiles. eukaryotictraits
B) Organisms with a nucleus that live in hot springs.
C) Single-celled organisms that cause human diseases.
38
When a plant cell is submerged in a very hypotonic solution, what is likely to occur?
The cell will become turgid.
The cell will burst.
Plasmolysiswill shrink the interior
The cell membrane will lyse.
39
Whichmolecule shown containsa functional groupfound in ATP, which cells use to store energy?
D
C
A
B
40
The atomic number of neon is 10. Which of the following is most correct about an atom of neon?
It has 10 electrons in its outer electron shell.
It will tend to lose 2 electrons.
It has an atomic mass of 10 daltons.
It has 8 electrons in its outerelectron shell and is inert.
41
A salamander relied on H bondsto cling to surfaces, what surface would cause most problems?
A surface coated with a thin film ofwater
a surface coated with salty water
Oily surface made with C and Hatoms covalently bonded
a surface coated with a syrupy carbohydrate
42
If a medicine has gone through a “placebo-controlled” trial, that means:
The USDA provides the placebo
A dummy pill was given to some in the study as a control
The published results went through a peer-review process
The experiments were controlled using the method ofdrplacebo
43
In science, an hypothesis is:
B) An idea that cannot be tested
A) An untested idea based on current knowledge
C) Backed by years of experimental data&has wide acceptance
D) Used rarely
44
Filamentous organism. Has a nucleus, a cell wall, no chloroplasts.How would you classify this?
A) domain Bacteria, kingdom Prokaryota
E) domain Eukarya,kingdom Fungi
C) domain Eukarya, kingdom Plantae
B) domain Archaea, kingdom Bacteria
45
Which of the followingmodifiespepetides thatwill be secreted?
vacuole
Golgi apparatus
lysosome
mitochondrion
46
Microtubules are part of the
Plasma membrane
Chromosomes
Endomembrane system
Cytoskeleton
47
Which of the following is an example of homeostasis?
Kidneys removing excess water from the blood
Raw food changing texture when cooked
A rabbit running
The Earth rotating at a constant velocity
48
Theelement present in all organic molecules is
carbon.
hydrogen.
nitrogen.
oxygen.
49
Which type of bond must be broken forwater to vaporize?
ionicbonds
bothhydrogen bonds and ionic bonds
hydrogen bonds
polarcovalent bonds
50
The sodium-potassium pump is atype of
Active transport
Diffusion
Phospholipid
Passive transport
