In a population of wildflowers, the frequency of the allele for red flowers was 0.8. What was the frequency of the white allele, the only other allele for flower color?
A. 0.8
B. 0.4
C. 0.6
D. *0.2
E. 0.1
95. In a population of wildflowers, the frequency of the allele for red flowers was 0.8. What is the frequency of homozygous red flower plants in the population?
A. 0.04
B. 0.16
C. 0.32
D. 0.48
E. *0.64
96. In a population of wildflowers, the frequency of the allele for red flowers was 0.8. What is the frequency of homozygous white flower plants in the population?
A. *0.04
B. 0.16
C. 0.32
D. 0.48
E. 0.64
97. In a population of wildflowers, the frequency of the allele for red flowers was 0.8. What is the frequency of plants in the population that are heterozygous for flower color?
A. 0.04
B. 0.16
C. *0.32
D. 0.48
E. 0.64
98. Which one of the following would cause the Hardy-Weinberg principle to be inaccurate?
A. The size of the population is very large.
B. Individuals mate with one another at random.
C. *Natural selection is present.
D. There is no source of new copies of alleles from outside the population.
E. None of the answers is correct.
99. If there is only one allele for a gene in a population, that gene is referred to as:
A. *monoallelic
B. fixed
C. common
D. monocistronic
E. histoincompatible
100. Which of the following would cause deviation from the Hardy-Weinberg equilibrium?
A. *small population
B. isolated
C. random mating
D. lack of selection pressure
E. no mutations
101. The total aggregate of alleles in a population is referred to as:
A. *the gene pool
B. the allelic frequency
C. the genotypic frequency
D. the genetic structure
E. none of these
102. A short piece of 1.___________ called a primer (produced by an enzyme called 2._______________) comes along and binds to the end of the 3.______________ strand.
A. *1. RNA, 2. primase, 3. leading;
B. 1. DNA, 2. primase, 3. leading;
C. 1. RNA, 2. primase, 3. lagging;
D. 1. DNA, 2. DNA polymerase, 3. leading.
E. 1. DNA, 2. primase, 3. new;
103. The result of DNA replication is 1__________ DNA molecules consisting of 2.______________ and 3._____________ chain of nucleotides.
A. 1. three, 2. two new, 3. one old;
B. *1. two, 2. one new, 3. one old;
C. 1. two, 2. lagging, 3. leading;
D. 1. four, 2. two new, 3. two old.
E. 1. five, 2. one new, 3. one old;
104. By convention, if the base sequence of a single strand of DNA is given, the left end of the sequence is 1.________, while the right end of the sequence is the 2.__________.
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A. 1. leading, 2. lagging;
B. 1. new, 2. old;
C. *1. 3' end, 2. 5' end;
D. 1. 5' end, 2. 3' end.
E. 1. 4' end, 2. 3' end
105. DNA Replication, like all biological polymerization processes, proceeds in three enzymatically catalyzed and coordinated steps: 1______________, 2.____________ and 3.___________________.
A. 1. elongation, 2. initiation, 3. termination;
B. 1. initiation, 2. termination, 3. elongation;
C. *1. initiation, 2. elongation, 3. termination;
D. 1. termination, 2. elongation, 3. initiation.
E. 1. termination, 2. initiation, 3. elongation.
106. DNA replication takes place during ______ of the cell division cycle.
A. G1
B. metaphase
C. *S phase
D. Anaphase
E. Prophase
107. The accepted hypothesis for DNA replication is
A. conservative theory
B. dispersive theory
C. *semi-conservative theory
D. evolutionary theory
E.non-conservative theory
108. DNA replication takes place in which direction?
A. 3' to 5'
B. *5 'to 3'
C. Randomly
D. Vary from organism to organism
E. 5' to 5'
109. Which of the following enzyme adds complementary bases during replication?
A. Helicase
B. Synthesase
C. Replicase
D. *Polymerase
E. primase
110. DNA helicase is used to
A. *unwind the double helix
B. interact the double helix closely
C. break a phosphodiester bond in DNA strand
D. none of the above
E. A) + C)
111. Okazaki fragments occur during
A. Transformation
B. *Replication
C. Polymerase reaction
D. Synthesis
E. transcription
112. Ribosomes are ultramicroscopic particles of 1.__________and 2.____________.
A. 1. tRNA, 2. protein;
B. 1. mRNA, 2. protein;
C. *1. rRNA, 2. protein;
D. 1. rRNA, 2. nucleotides.
E. 1. mRNA, 2. nucleotides.
113. Transfer RNA exists in 1._____________________ and carries 2.________________ to 3.___________________ for protein synthesis.
A. 1. nucleus, 2. amino acids, 3. the ribosomes;
B. *1. the cell cytoplasm, 2. amino acids, 3. the ribosomes;
C. 1. the cell cytoplasm, 2. amino acids, 3. the endoplasmic reticulum;
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D. 1. the cell cytoplasm, 2. nucleotides, 3. the ribosomes.
E. 1. nucleus, 2. nucleotides, 3. the ribosomes.
114. Transcription is divided into _________________________.
A. pre-initiation, initiation, elongation, termination;
B. *initiation, elongation, termination;
C. pre-initiation, initiation, elongation;
D. pre-initiation, initiation, pre-elongation, elongation, termination.
E. pro-initiation, initiation, elongation, termination;
115. Promoters are regions of 1.______________ that promote 2.___________________ and, in 3.________________, are found at -30, -75, and -90 base pairs upstream from the transcription start site (abbreviated to TSS). .
A. 1. DNA, 2. transcription, 3. eukaryotes;
B. 1. RNA, 2. transcription, 3. eukaryotes;
C. 1. DNA, 2. replication, 3. eukaryotes;
D. *1. DNA, 2. transcription, 3. prokaryotes.
E. 1. RNA, 2. replication, 3. eukaryotes;
116. Increasing the number of complete sets of chromosomes
A) haploidy
B) polyploidy
C) heteroploid
D) aneuploidy
E) monoploidy
117. Genes inherited by the body from parents will be:
A) phenotype
B) karyotype
C) genotype(+)
D) monohybrid
E) polyhybrid
118. Inheritance of AB0 blood groups in humans is an example:
A) codominance(+)
B) incomplete dominance
C) total domination
D) A) + B)
E) B) + C)
119. The law of purity of gametes is…
A) only 1 allele of a pair of alleles falls into each gamete
this parent gene(+)
B) each gamete gets a pair of alleles of the gene
parent's
C) the gamete does not receive alleles from the parent species
D) A) + B)
E) don`t correct answers
120. The basis of selection is:
(A) natural selection
B) artificial selection(+)
C) sexual selection
D) struggle for existence
E) A) +C)
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