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ASU BIO 181 Final Review Exam Questions & Answers
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ASU BIO 181 Final Review Exam Questions& Answers
Which protein influences the ability of RNA polymerase to transcribe genes? -
CORRECT ANSWER-Transcription factors
Mitosis results in the formation of two genetically identical daughter cells. This is
because - CORRECT ANSWER-all the genetic material is duplicated then
segregated equally to the daughter cells.
Which of the following is an overgrowth of cells that serves no useful purpose? -
CORRECT ANSWER-Tumor
Why must the life cycle of sexually reproducing species alternate between
haploid and diploid stages? - CORRECT ANSWER-Meiosis must occur at some
point in the life cycle to prevent a doubling of chromosomes in each generation.
Eyelash length is an inherited trait. In the human population, there is an eyelash
length gene. There are two possible variants of this gene—an allele for long
eyelashes (>1cm) and an allele for short eyelashes (1 cm or less). The allele for
long eyelashes is dominant (L) and the allele for short eyelashes is recessive (l).
An individual who is heterozygous for eyelash length would have which of the
following genotypes? - CORRECT ANSWER-Ll
In a eukaryotic cell, the direct product of transcription is - CORRECT
ANSWER-pre-mRNA
Which is NOT a component of the translation machinery? - CORRECT
ANSWER-Protein polymerase
The following mRNA transcript would result in which polypeptide
sequence?5′-ACU UUC ACU AUG UUU UUA UCC UCC ACU CCU UGA-3′
Use the following codons and the amino acids they encode.AUG = Start or Met;
UUU, UUC = Phe; UUA, UUG = Leu; UCU, UCC = Ser; CCU, CCC = Pro; ACU,
ACC = Thr; UGA = Stop. - CORRECT ANSWER-Met-Phe-Leu-Ser-Ser-Thr-Pro
, Place the following events of mitosis in the correct order.
I. Sister chromatids align on the metaphase plate.
II. The cleavage furrow forms.
III. The nuclear membrane breaks up.
IV. Sister chromatids begin to condense.
V. Sister chromatids separate. - CORRECT ANSWER-IV, III, I, V, II
How many nucleotides are contained in a single codon? - CORRECT
ANSWER-3
True or False: If the sequence for one strand of DNA is 3′-TCGATT-5′ then its
complementary strand would have a sequence of 3′-AGCTAA-5′. - CORRECT
ANSWER-False
Humans have __________ different pairs of autosomes. - CORRECT
ANSWER-22
Which is not a result of DNA polymerase III function? - CORRECT
ANSWER-Removal of RNA primers
Transcription begins near a site in the DNA called the - CORRECT
ANSWER-promoter
Genes expressed at relatively constant levels in tissues regardless of variations
in the animal's condition are called - CORRECT ANSWER-constitutive genes
A cell's ability to control their level of gene expression is called - CORRECT
ANSWER-gene regulation.
The building blocks of DNA are - CORRECT ANSWER-nucleotides.
What is a dominant allele? - CORRECT ANSWER-In a heterozygous individual,
the allele that determines the phenotype
Genes that encode proteins are first transcribed to mRNA, and then are
translated into protein. What is the MOST important factor determining the
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