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WorksheetsBio Midterm Review
Total questions: 40
Worksheet time: 28mins
Which statement summarizes the relationship between DNA, proteins, and amino acids?
The DNA molecule is a protein formed by amino acids that are linked together by peptide bonds.
The type of protein that composes DNA codes for the twenty different amino acids.
The sequence of amino acids in DNA determines the type of protein formed during protein
synthesis.
The sequence of nucleotides in DNA codes for specific amino acids which bond to form proteins.
What factor determines the original shape of a protein?
the amount of DNA in the nucleus
the amount of ATP available in the cell
the location of the protein inside the cell
the amino acid sequence in the protein
Paramecia are common one-celled protists that can be found in lakes, ponds, and rivers all over the United States.
The hair-like structures surrounding the paramecium that are used for locomotion are called
The image shows an amoeba, a unicellular organism commonly found in pond water.
The outer portions of the amoeba that are used for survival, capturing food, and maintaining homeostasis, are called what?
Why are your muscles sore after a workout?
build-up of lactic acid when they run out of O2
What is the fuel commonly used to provide the energy for cellular respiration?
Which describes the difference between aerobic and anaerobic cellular respiration?
Aerobic respiration is completed in the presence of oxygen, while
anaerobic is not.
Anaerobic respiration is only found in animals, while aerobic is
never found in animals.
Aerobic respiration is only found in animals, while anaerobic is
never found in animals.
Anaerobic respiration is completed in the presence of oxygen, while
aerobic is not.
The freshwater plant, Elodea , produces bubbles when placed in direct light. What is occurring?
Bubbles of oxygen were produced as a result of photosynthesis.
Bubbles of carbon dioxide were produced as a result of cellular respiration.
Bubbles of oxygen were produced as a result of cellular respiration.
Bubbles of carbon dioxide were produced as a result of photosynthesis.
Which word equation best represents the process of cellular respiration?
carbon dioxide + glucose → oxygen + water
carbon dioxide + water → glucose + oxygen
glucose + oxygen → carbon dioxide + water
oxygen + water → carbon dioxide + glucose
Enzymes act as catalysts in biochemical reactions. In the diagram, which represents a catalyst?
W
X
Y
WX
Illustration 1 shows sugar that has formed a bond by the action of an enzyme. Illustration 2 shows the enzyme, and Illustration 3 shows the enzyme after the addition of heat. How does the addition of heat affect the ability of an enzyme to help the sugar molecules form a bond?
Heat allows the sugar molecules to bond more quickly.
Heat provides places on the enzyme for other molecules to bond.
Heat changes the enzyme so that the sugar molecules can no longer bond.
Heat changes the chemical composition of the sugar molecules so they no longer need the enzyme.
Which nucleic acid is correctly paired with its function?
mRNA: moves genetic information from the nucleus to the ribosome
DNA: forms peptide bonds between amino acids
mRNA: lines up amino acids at the ribosome
tRNA: moves genetic information from the nucleus to the ribosome
The DNA sequence ACTCG produces which mRNA sequence during transcription?
Which molecules are joined together to make proteins?
Sickle cell anemia is a condition that affects the shape of a person’s red blood cells. Normal red blood cells are round, but the red blood cells of a person with sickle cell anemia are shaped like crescent moons.
Sickle cell anemia is passed from parent to offspring. How did a change from the normal red blood cell shape most likely originate?
The table shows a few messenger RNA codons.
Which point mutation would result in the formation of a new protein?
UGU to UGC
UAA to UAG
UUU to UUA
UCA to UCG
Every copy of a particular protein manufactured by a cell shows the same incorrect amino acid at the same point in its structure. According to the central dogma of molecular biology, in which structure does this error originate?
DNA
mRNA
tRNA
rRNA
What can be concluded from the table?
Different cells function together to perform a single task.
Different cells are specialized to perform different functions.
The same gene is expressed differently in different cells.
The same task is performed by different structures in different cells.
How is the DNA sequence AATTA replicated in a new strand during semiconservative replication?
The overall roles of DNA and RNA are illustrated. Which process is represented between RNA and Protein
transcription
replication
translation
mutation
What statement best describes the role of DNA in protein synthesis?
DNA caries the amino acids to the ribosomes
DNA forms the structural parts of the ribosomes.
DNA joins the chains of amino acids to form a protein.
DNA contains the information for building individual proteins.
How many basic units of information in a DNA molecule are required to encode a single amino acid?
Which of the following aspects of a DNA molecule is responsible for determining the traits of an organism?
Which RNA sequence will result from the transcription of the DNA sequence TTC CGA ATG GGA?
UUA GCU UAC CCU
Which polypeptide would be produced from the DNA segment below?
TAG CAA GTG GCA
Methionine - Leucine - Aspartate - Alanine
Lysine - Glutamine - Aspartate - Alanine
Leucine - Leucine - Valine - Alanine
Isoleucine - Valine - Histidine - Arginine
A section of DNA has these bases:
TAG CAG TAC
Which mRNA sequence is produced from this DNA section?
AUC GUC AUG
During translation, what does the tRNA deliver to the ribosomes?
Which statement best explains the advantage of the hydrogen bonds between the nucleotides in a DNA molecule?
Which best describes a strand of DNA?
It is a single-stranded nucleic acid with ribose and uracil.
It is a double-stranded nucleic acid with deoxyribose and uracil.
It is a single-stranded nucleic acid with deoxyribose and thymine.
It is a double-stranded nucleic acid with deoxyribose and thymine.
Why is DNA replication considered a semi-conservative process?
RNA will combine with DNA using the base pair rules during this process.
DNA has two sides of complementary base pairs held together by weak
bonds.
DNA replication must occur before mitosis to produce identical daughter
cells.
The new DNA molecules contain one strand of the original molecule and one
new strand.
Which RNA is a copy made from a DNA strand that can be transported to a ribosome?
Why must DNA replication have to occur before a cell can divide by mitosis?
Which effect could a mutation in mRNA have on the production of proteins?
Which of the following is a typical example of a unicellular organism?
earthworm
bacteria
fungi
green algae
At the end of mitosis, a cell divides into two cells. What must happen before the cell divides?
Chromosomes must be replicated.
A scientist studied human skin cells as they produced two genetically identical daughter cells from a single parent cell. The scientist mapped the steps as shown.
Which of the following did the scientist map in this scenario?
photosynthesis
meiosis
the cell cyccle
mitosis
Which event outlines protein synthesis?
(1) mRNA is transcribed; (2) mRNA leaves the nucleus; (3) Ribosomes translates mRNA; (4) Amino Acids form polypeptide chain
(1) mRNA is transcribed; (2) Amino Acids form polypeptide chain; (3) Ribosomes translates mRNA; (4) Ribosomes translates mRNA
(1) Ribosomes translates mRNA; (2) Ribosomes translates mRNA; (3) Amino Acids form polypeptide chain; (4) mRNA is transcribed
(1) Amino Acids form polypeptide chain; (2) mRNA is transcribed; (3) Ribosomes translates mRNA; (4) Ribosomes translates mRNA
In which phase of the cell cycle is DNA replicated?
The chemical colchicine disrupts cell division. Which cell process would most likely stop if colchicine were added to a culture of human liver cells?
