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DC Bio Study Guide FE 1221 Flashcards | StudBud
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DC Bio Study Guide FE 1221
DC Bio Study Guide FE 1221
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1
If parent cell has 48 chromosomes, how many chromosomes will each daughter cell have after mitosis & cytokinesis occurs?
96 chromosomes
48 chromosomes
24 chromosomes
12 chromosomes
2
F2 offspring Mendelian monohybrid cross / homozygous dominant & homozygous recessive parents would produce genotype
AA only
AA and Aa
Aa and aa
AA, Aa and aa
3
Which statement is NOT true about ionic bonds?
Ion has the same number of electrons as nonionic atom of the same element.
Electrons are completely lost or gained in ion formation.
1 atom acts as electron donor & another atom acts as electron acceptor.
A salt such as NaCl is formed by an ionic reaction.
4
Which is NOT true about the cell theory?
It states that bacteria and other small organisms can arise spontaneously.
Its various parts were described by Schleiden, Schwann, and Virchow
It states that all organisms are composed of cells.
It states that all cells come from preexisting cells.
5
Fish sperm is composed mostly of DNA. If we tested a sample chemically, we should find relatively high amounts of
nitrogenous bases, sugar, and phosphate groups
amino acids and unsaturated fats.
triglycerides and ATP.
phospholipids and steroids.
6
During DNA replication, the enzyme _____ catalyzes the elongation of new DNA strands.
DNA ligase
helicase
DNA polymerase
ATP synthase
7
He gives the 1st group gets placebo, a 2nd group gets antibiotic A, 3rd group gets antibiotic B. Which control?
the group that received antibiotic A
the group that received antibiotic B
the group that received the placebo
both groups receiving antibiotic A and B
8
The part of animal cell membrane that regulates fluidity by stiffening membrane at hi temp & prevent the membrane freeze
a steroid
cholesterol
All of the choices are correctno
lipid in nature
9
What are the basic structures that make up a nucleotide?
pentose sugar, sodium, and nitrogen-containing base
pentose sugar, nitrate, and phosphorus-containing base
pentose sugar, phosphate, and nitrogen-containing base
pentose sugar, phosphate, and sulfur-containing base
10
In a phospholipid bilayer, the
phosphate heads are oriented to the exterior of cell or tothe cytoplasm.
fatty acid tails are hydrophilic.
fatty acid tails are ionized.
phosphate groups are hydrophobic.
11
A triglyceride is a polymer made up of which kind of subunits?
nucleotides
amino acids
fatty acids and glycerol
glucose or midified glucose molecules
12
Which is associated with the inability to produce factor VIII in the blood?
Duchenne muscular dystrophy
Williams syndrome
trisomy 21
hemophilia A
13
Which of the following is the primary function of carbohydrates in living organisms?
Carbohydrates store hereditary information.
Carbohydrates are used mainly for insulation and protection.
Carbohydrates form the basic structural framework of all cell membranes.
Carbohydrates are used as an immediate energy source.
14
Which process reduces molecular oxygen to water?
the electron transport system
the citric acid cycle
fermentation
glycolysis
15
Which of the following is NOT a function of proteins?
motion
defense
support
storage of energy
16
All cells have these two characteristics:
contain DNA in the nucleus and have a plasma membrane
contain mitochondria and chloroplasts
produce a cell wall outside of the plasma membrane
have a plasma membrane and ribosomes in the cytoplasm
17
The most common lethal genetic disease among Caucasians i
phenylketonuria.
cystic fibrosis.
Tay-Sachs disease.
neurofibromatosis.
18
DNA replication is considered semiconservative because
it never replicates in the 5' to 3' prime direction
it will create three new identical strands when finished.
it uses one old strand as a template for the synthesis of a new strand.
it always replicates in the 3' to 5' prime direction.
19
Which carbohydrate is found in the cell walls of plants?
cellulose
glycogen
chitin
starch
20
The function of sunlight in photosynthesis is to
combine carbon dioxide and water to form ATP and NADPH.
fix O2 in the Calvin cycle.
excite electrons in chlorophyll.
reduce NADPH to NADP.
21
Which sequence of the mitotic stages is correct?
prophase, prometaphase, metaphase, anaphase, telophase
telophase, anaphase, prophase, prometaphase, metaphase
prophase, telophase, anaphase, prometaphase, metaphase
prophase, anaphase, prometaphase, metaphase, telophase
22
In the Watson and Crick model of DNA, the "steps" of the ladder are composed of
two purines
a sugar and a phosphate
a purine and a pyrimidine
sugars
23
A researcher is interested in determining avg length & weight of loblolly pine tree needles in the SE United States.
observation
experimentation
neither observation nor experimentation
both
24
The expected outcome of an experiment is known as
a scientific theory or principle
a scientific model
an experiment
a prediction
25
If 2 parents have blood genotypes I Ai and I Bi, which of following blood genotypes are possible in their children?
I Ai, I Bi, I AI B and ii
I AI A, I BI B, and I AI B only
I Ai and I Bi only
I Ai, I Bi, and I AI B only
26
The first phase of cellular respiration is
glycolysis.
the electron transport system.
the citric acid cycle.
fermentation.
27
Sugars and amino acids are carried into the cell by means of
endocytosis.
facilitated transport.
diffusion
exocytosis.
28
In the scientific method, what precedes the formation of the hypothesis?
analysis of results
experimentation
a prediction
observation
29
Mendelian monohybrid cross homozygous dominant parent & homozygous recessive parent, which generation is all hetero
P generation
F 2 generation
F 3 generation
F 1 generation
30
Human blood has a pH of about 7.4. This is
very acidic
neutral
slightly basic
slightly acidic
31
Which of the following are subatomic particles found in an atom?
megatron, ultron, and krptron
protons, electrons and neutrons
microns, quarks, and positrons
particles, electricles, and neurons
32
Active transport
occurs in osmosis and facilitated transport.
All of the choices are correct.
requires an input of ATP.
is involved in diffusion.
33
If woman is carrier for color blind recessive allele & her husband is normal, what are chances their son will be color
50% since the mother is a carrier.
100% because the mother is a carrier.
None since he will be a carrier like his mother.
None since the father is normal.
34
Women with X-linked disorder pass genes for disorder to _, & men with X-linked disorder pass genes for disorder _
only their daughters; only their daughters
both their daughters and sons; only their sons
both their daughters and sons; only their daughters
both their daughters and sons; their daughters and sons
35
Which statement is NOT true about covalent bonds?
A single covalent bond is drawn as a line between two atoms.
A pair of electrons is shared between two atoms for each covalent bond.
Covalent bonds form when electron is completely lost or gained from atom.
A covalent molecule contains one or more covalent bonds
36
Molecular level, cells from different organisms vary in tolerance to temperature & pH. This variation can mostly attribu
the types of enzymes present in the cells.
ability of the cells to form glucose polymers.
replication of nucleic acids.
ATP efficiency.
37
The function of mitosis is
ensure that each new cell receives a complete set of genetic information.
asexual reproduction in some species.
growth of the organism and tissue repair.
All of the choices are correct.
38
Which of the following features is unique to bacterial cells compared to eukaryotic cells?
nucleoid region
cell wall
nucleus
cell membrane
39
Which stage is most associated with a cell that is unable to divide again, such as a muscle or nerve cell?
M phase
G 1 phase
G 0 phase
G 2 phase
40
Which statement is NOT true about polar covalent bonds?
Polar covalent bonds are important in the characteristics of water
Larger atom in polar bond attracts electron strongly than smaller atom.
The oxygen of a water molecule is electropositive relative to the hydrogen.
Electrons are shared unequally in a polar covalent bond.
41
Which of the following carbohydrates would NOT be a molecule used for energy storage?
starch
All of the above are used for energy storage
glucogen
cellulose
42
Which best describes a conceptual scheme in science that is strongly supported, not found incorrect, & based on results
a scientific model
a scientific theory or principle
experimental results
an experiment
43
Upon examination, a person is found to only have half the normal number of LDL-cholesterol receptors.
X-linked inheritance
polygenic inheritance
pleiotropic inheritance
incomplete dominance
44
The offspring of a monohybrid testcross could have what possible genotype(s)?
Aa and aa
AA only
AA and Aa
AA, Aa and aa
45
Saturated fatty acids and unsaturated fatty acids differ in
the number of hydrogen atoms present.
the consistency at room temperature.
All choices are differences between saturated & unsaturated fatty acids.
the number of carbon-to-carbon bonds.
46
Which of the following is a true statement concerning meiosis in males and females?
Males provide more genes in sperm than females provide in eggs.
Spermatogenesis results in 4 functional sperm. oogenesis results n 1 egg
Sperm contain recombination of genes are more successful fertilizing egg.
Crossing-over occurs more often in the formation of sperm than in eggs.
47
How do the lipids of the cell membrane and the lipids found in butter and vegetable oil differ?
the number of fatty acids
lipids of the cell membrane are solid at body temperature whereas the l
the carbon to carbon bonds
the type of glycerol molecule
48
Proteins in a membrane are
Neither answer choice is true.
integral if are embedded in membrane & protrude either surfaces bilayer.
Both answer choices are true.
peripheral if they are on the inside surface held in place by cytoskeleton.
49
The manner in which a scientist intends to conduct an experiment is called
the conclusion
the experimental design
data collection and analysis
inductive reasoning
