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WorksheetsEOC Review #4
Total questions: 26
Worksheet time: 21mins
During transcription the DNA base sequence is transcribed into a complementary mRNA sequence. A codon table like the one shown below lists the amino acids coded for by particular triads of mRNA bases. A segment of DNA has undergone a mutation in which one nucleotide has been changed. The original sequence was ACG and the new sequence is ACA. Use the codon table to determine whether or not this mutation will cause a change in the phenotype of the organism.
Yes, the phenotype of the organism would change because a new amino acid will be coded for.
Even though the DNA sequence changed, the sequence still codes for the same amino acid, so no change in phenotype will occur.
It is impossible to determine if a change in phenotype will occur using only the DNA sequence.
Yes, the phenotype of the organism would change because any change in the DNA sequence will cause a change in phenotype.
A scientist puts nucleotide chains of UUUUUU in a test tube under conditions allowing protein synthesis. Soon the test tube is full of polypeptide chains composed only one the amino acid phenylalanine. What does this experiment indicate?
Protein synthesis malfunctions in test tubes.
Most proteins contain only one type of amino acid.
UUU codes for the amino acid phenylalanine.
The amino acid phenylalanine is composed of uracil.
Mitosis and meiosis are processes involved in cellular reproduction. Which of the following describes and event that results from mitosis but NOT meiosis?
A. two stages of cell division
B. replication of cellular genetic material
C. daughter cells that are identical to the parent cell
D. four daughter cells that are produced from each parent cell
How are sexual reproduction and asexual reproduction different from each other?
A. sexual reproduction requires two parents and asexual reproduction requires only one parent
B. asexual reproduction requires two parents and sexual reproduction requires only one parent
C. mutation rates are lower in sexual reproduction than in asexual reproduction
D. asexual reproduction occurs only in multicellular organisms
Which type of reproduction leads to increased genetic variation on a population?
A. Parthenogenesis
B. Asexual reproduction
C. Sexual reproduction
D. Vegetative reproduction
Which of the following phrases best describes cancer?
A. absence of cyclins in the DNA
B. multiple gene mutations on a chromosome of DNA
C. uncontrolled cell growth caused by mutations in genes that control the cell cycle
D. presence of genetic defects caused by hereditary disorders
Which of the following phases of mitosis is represented by the diagram below?
A. prophase
B. metaphase
C. anaphase
D. telophase
A scientist wants to change the DNA of a sexually reproducing organism and have the new DNA present in every cell of the organism. In order to do this after fertilization, she would change the DNA in which of the following?
A. zygote
B. placenta
C. testes of the father
D. ovaries of the mother
Which row in the chart below indicates the correct process for each event indicated?
A. row 1
B. row 2
C. row 3
D. row 4
The diagram below shows a cellular process that occurs in organisms. What is the name of this process?
A. meiosis
B. mitosis
C. endocytosis
D. phagocytosis
The diagram below shows homologous chromosomes during prophase I of meiosis. Which of the following correctly describes the process being illustrated?
A. mutation in which the DNA content of the gene is altered
B. segregation of sister chromatid
C. condensation and segregation of alleles
D. crossing-over in which alleles are exchanged
Which of the following best describes meiosis?
A. It is carried out in all tissues that require cell replacement.
B. It occurs only in cells in the reproductive structures of organisms.
C. It happens in all tissues except the brain and spinal cord.
D. It is the first stage of mitosis.
