WorksheetsRetake 3rd major
Total questions: 10
Worksheet time: 5mins
As unspecialized cells mature, what controls their development into specific cell types?
The rate at which the cells grow
The genes expressed within the cells
The nutrients available to the cells
The age of neighboring cells
A DNA sequence of a gene reads: ATG CCG ATT CCC GGG CGA. After being exposed to radiation, the sequence reads: ATG CCG ATT CCG GGG CGA. Which type of mutation occurred?
Deletion
Insertion
Inversion
Substitution
During which phase of the cell cycle do DNA-copying errors most likely occur?
S phase
G1 phase
G2 phase
M phase
What statement BEST explains why a DNA mutation results in a protein that is the same as the initial protein synthesized before the mutation?
One amino acid substitution does not affect protein synthesis.
Different codons can be translated into the same amino acid, so some mutations do not affect protein synthesis.
Only mutations that occur at the chromosomal level change protein function.
Amino acids have similar functions, so their corresponding proteins
What are the components of a DNA nucleotide? Select THREE correct answers.
A nitrogenous base
A deoxyribose molecule
A prokaryotic cell
A phosphate group
A bacteriophage
Which statement explains how the different cell types in an organism are formed?
Each cell type uses its own unique replication process.
Each cell type expresses different genes at different times.
Each cell type contains a different part of the original DNA.
Each cell type has different enzymes to replicate genetic material.
What type of mutation is shown in a polypeptide chain segment when one base is replaced with another?
Substitution
Deletion
Insertion
Translocation
Uncontrolled production of cyclins during the cell cycle will most likely result in:
The formation of tumors
The immediate death of the cell
The transfer of cyclins to other cells
The formation of haploid cells
A group of crime scene investigators has isolated a small sample of DNA believed to belong to a suspect. The sample contains too little DNA to be analyzed easily. What should they do first?
Use gel electrophoresis to separate the strands of DNA by size.
Use polymerase chain reaction to make multiple copies of a specific DNA sequence.
Expose the sample to radiation to encourage genetic mutations.
Place the DNA into a bacterial cell host to replicate it more quickly.
Which answer choice correctly describes the model of the mRNA strand being transcribed?
The mRNA strand is complementary to the DNA template strand; however, uracil instead of adenine is paired with thymine.
The mRNA strand is complementary to the DNA template strand; however, uracil instead of thymine is paired with adenine.
The mRNA strand is an exact copy of the DNA template strand; however, uracil instead of adenine is paired with thymine.
The mRNA strand is an exact copy of the DNA template strand; however, uracil instead of thymine is paired with adenine.
