A sequence of DNA on the “original” strand is 5′-ACTTGGGA-3′. Whatis the complementary sequence on the “new” strand?
Question 1 options:
3′-TGAACCCT-5′
3′-ACTTCGGA-5′
3′-TCCGAAGT-5′
3′-AGGCTTCA-5′
Question 2 (2 points)
Listen
Put the following steps of DNA replication in the correct order.
1) DNA polymerase III polymerizes long stretches of DNA.
2) Helicases open up the DNA from the origin.
3) Ligase seals small pieces of DNA together to make continuous
strands.
4) Primase makes a “starting” primer of RNA.
5) DNA polymerase I replaces the temporary RNA primers with DNA.
Question 2 options:
4-2-1-3-5
1-2-3-4-5
2-1-4-3-5
2-4-1-5-3
Question 3 (2 points)
Listen
Which type of mutation would probably result in the most serious
damage?
Question 3 options:
a deletion in the last intron
a base substitution in the 3′ untranslated region
a single base insertion in the first exon
Question 4 (2 points)
Listen
Which of the following is NOT a step of mRNA processing in
eukaryotes?
Question 4 options:
a 5′ cap is added to mRNA
introns are removed from mRNA
a 3′ poly-A tail is added to mRNA
plasmids are ligated with mRNA
Question 5 (2 points)
Listen
Transcription occurs in the ____________ and translation occurs at the
_____________.
Question 5 options:
ER; Golgi bodies
mitochondria; chloroplast
nucleus; ribosome
cytoplasm; nucleus
Question 6 (2 points)
Listen
DNA polymerase has more than one role in DNA duplication. Which of
the following does DNA polymerase do?
Question 6 options:
Replaces RNA primer with DNA
Adds complementary DNA bases along a DNA template
Proofreads the new strand of DNA
All of the above
Question 7 (2 points)
Listen
In cellular respiration, energy for making ATP is harvested most directly
from:
Question 7 options:
gases in the air
removing a phosphate from ATP
breaking chemical bonds in sugars
water’s hydrogen bonds
Question 8 (2 points)
Listen
According to the fluid mosaic membrane model, proteins are:
Question 8 options:
unable to be part of the cellular membrane
the only component of the cellular membrane
embedded in the phospholipid bilayer, with their hydrophobic parts in the center
constantly diffusing in and out of the membrane by facilitated transport
Question 9 (2 points)
Listen
A cell that proceeded to cell division without completing S phase
would:
Question 9 options:
have extra ribosomes
have an extra copy of all its chromosomes
be smaller than normal
not have enough DNA to be divided normally
Question 10 (2 points)
Listen
What is the most likely and complete path for a digestive enzyme
secreted by a cell in the pancreas?
Question 10 options:
nucleus to Golgi to vesicle to cell membrane
ribosome to rough ER to mitochondria to vesicle to cell membrane
cell membrane to Golgi to rough ER
ribosome on rough ER to Golgi to vesicle to cell membrane
Question 11 (2 points)
Listen
An organism that can produce ATP without oxygen in its environment
must be:
Question 11 options:
using glycolysis and fermentation
photosynthesizing only
substituting the citric acid cycle for the Calvin cycle
creating oxygen by breaking down water molecules
Question 12 (2 points)
Listen
Find the examples of levels of biological hierarchy in the order from
least complex to most complex.
Question 12 options:
insulin protein, pancreatic cell, pancreas, endocrine system, human
pancreatic cell, insulin protein, pancreas, endocrine system, human
human, pancreas, endocrine system, insulin protein, pancreatic cell
insulin protein, pancreas, endocrine system, pancreatic cell, human
Question 13 (2 points)
Listen
A protein that is exposed to high heat will probably:
Question 13 options:
mutate, by changing the DNA that codes for it
hydrophobate, by melting down its water molecules
diffuse, by passing through the cell membrane
denature, by the breaking of bonds within its structure
Question 14 (2 points)
Listen
NAD+ and NADP+ are important in respiration and photosynthesis
because they:
Question 14 options:
become oxidized to form FADH
form chlorophyll
temporarily hold electrons and hydrogen atoms between reactions and molecules
are converted to ATP when a phosphate is added to their structures.
Question 15 (2 points)
Listen
Based on the cycle of photosynthesis and respiration the ultimate
source of energy for living things on Earth is:
Question 15 options:
carbohydrates
water
the sun
carbon dioxide
Question 16 (2 points)
Listen
Starch
Question 16 options:
is a monosaccharide
is a protein
is a polymer of glucose
is an ion
Question 17 (2 points)
Listen
Because carbon has four electrons in its outer energy level:
Question 17 options:
it can form bonds with carbon atoms only
these atoms are naturally chemically stable
it can react with up to four other atoms to form covalent bonds
it cannot react with anything other than organic molecules
Question 18 (2 points)
Listen
Because of the absorption of chlorophyll,a plant will grow best when
given these colors of light:
Question 18 options:
green and yellow
green and red
red and blue
Question 19 (2 points)
Listen
When pure-breeding black rabbits are crossed with pure-breeding
white rabbits, all black rabbits result. A wild black rabbit of unknown
genotype is found. It is bred with a white rabbit, and the offspring are
10 black and 3 white rabbits. What is the genotype of the “unknown”
wild black rabbit?
Question 19 options:
heterozygous
homozygous dominant
homozygous recessive
Question 20 (2 points)
Listen
What type of cell might have the most mitochondria?
Question 20 options:
muscle cell requiring lots of energy
plant cell photosynthesizing
skin cell undergoing mitosis
spermatocyte making gametes
Question 21 (2 points)
Listen
Which of the following is a similarity between DNA and RNA?
Question 21 options:
both are doubled stranded
both have nucleotides as their monomers
both have uracil as a base
both have the sugar deoxyribose
Question 22 (2 points)
Listen
Which of the following is hydrophobic?
Question 22 options:
sugars
starch
lipids
DNA
Question 23 (2 points)
Listen
Which of the following is NOT true about both photosynthesis and
respiration?
Question 23 options:
animals are able to perform both processes
they are redox reactions
enzymes catalyze the steps of these processes
they rely on organelle inner membranes to create concentration gradients of protons
Question 24 (2 points)
Listen
What is the basis for the cohesive properties of water molecules that
make it possible for insects to stand on the surface of water?
Question 24 options:
ionic charges
neutral pH
hydrogen bonding
Question 25 (2 points)
Listen
Which of the following is not a true difference between the
chromosomes of eukaryotes and those of prokaryotes?
Question 25 options:
Eukaryotic chromosomes are linear, while those of prokaryotes are circular
Eukaryotic chromosomes are larger while prokaryotic ones are smaller
Eukaryotes usually have more than one chromosome while prokaryotes have only one
Eukaryotic chromosomes are made of DNA and while prokaryotic chromosomes are made of chitin and
lipids
Question 26 (2 points)
Listen
Cystic fibrosis is caused by a recessive gene. A man and a woman are
both carriers of cystic fibrosis but do not express it. What fraction of
their children are expected to express the cystic fibrosis phenotype?
Question 26 options:
3/4 of them
1/4 of them
1/2 of them
all of them
Question 27 (2 points)
Listen
The smallest unit that can carry on all the functions of life is called:
Question 27 options:
molecules
cells
organelles
species
Question 28 (2 points)
Listen
A diploid human cell contains 46 chromosomes. After mitosis and cell
division there are:
Question 28 options:
two cells with 23 chromosomes
four cells with 23 chromosomes
two cells with 46 chromosomes
four cells with 46 chromosomes
Question 29 (2 points)
Listen
A woman has blood type A. She has two children with the same
man. One child’s blood type if B and one child’s blood type is O. Is this
possible? Why/why not?
Question 29 options:
Yes, the fathers blood type is B
Yes, the fathers blood type is O
Not possible, must be two different fathers
Yes, the fathers blood type is AB
Question 30 (2 points)
Listen
Adenine makes up 10% of the nucleotides in a DNA sample. What
percent of the nucleotides will be cytosine?
Question 30 options:
10
40
20
80
Question 31 (2 points)
Listen
Your genes are composed of DNA held in the nucleus. Your genes
hold information about how to make proteins. What is the
intermediate molecule that physically moves and decodes information
from DNA to protein?
Question 31 options:
carbohydrates
starch
mRNA
amino acids
Question 32 (2 points)
Listen
If a cell had a punctured inner membrane on its mitochondrion which
step of cell respiration would be undisturbed?
Question 32 options:
glycolysis
citric acid cycle
oxidative phosphorylation
Question 33 (2 points)
Listen
Cellular respiration produces more ATP than fermentation.
Question 33 options:
True
False
Question 34 (2 points)
Listen
A male can produce sperm with either an X or a Y chromosome.
Question 34 options:
True
False
Question 35 (2 points)
Listen
A female can produce eggs with either an X or a Y chromosome.
Question 35 options:
True
False
Question 36 (2 points)
Listen
Diffusion is an active process requiring energy.
Question 36 options:
True
False
Question 37 (2 points)
Listen
Animal cells form cell walls during cytokinesis.
Question 37 options:
True
False
Question 38 (2 points)
Listen
Mitochondria have DNA that is different from nuclear DNA.
Question 38 options:
True
False
Question 39 (2 points)
Listen
A nucleotide consists of a sugar a phosphate and a nitrogen base.
Question 39 options:
True
False
Question 40 (2 points)
Listen
Carbon flows through ecosystems it does not have a cycle.
Question 40 options:
True
False
Question 41 (2 points)
Listen
Water is the source of oxygen produced in photosynthesis.
Question 41 options:
True
False
Question 42 (2 points)
Listen
An individual cannot be a carrier for a recessive disorder.
Question 42 options:
True
False
Question 43 (2 points)
Listen
An individual cannot be a carrier for a dominant disorder.
Question 43 options:
True
False
Question 44 (2 points)
Listen
Amino acids are carried by a helper molecule called tRNA.
Question 44 options:
True
False
Question 45 (2 points)
Listen
The shape of a DNA molecule is a beta-pleated sheet.
Question 45 options:
True
False
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