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TEST_DE_LE_Unit4
By Nicholas Meyer
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Last updated almost 3 years ago
26 questions
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Question 1
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Question 9
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Question 11
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Question 12
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Question 13
13.
The following is a strand of DNA that is coding for different amino acids.
5' TAC CTC AGC GAT 3'
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Question 18
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Question 19
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Question 20
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Question 21
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Question 24
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Question 25
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Question 26
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The blue flowers that a plant inherits from its parents are an example of a
mutation
trait
dihybrid cross
sex-linked disease
An individual who expresses a recessive trait is ______ for that trait.
homozygous
both homozygous and heterozygous
heterozygous
neither homozygous nor heterozygous
If a person has a dominant allele for brown eyes and a recessive allele for blue eyes, which statement is correct?
The individual has brown eyes.
The individual has blue eyes.
Eye color cannot be determined based on the given information.
The individual has eye color that is a mix of brown and blue.
What are the chances that two heterozygous (Bb) parents will have a dominant expressing child?
25 percent
50 percent
75 percent
100 percent
If a cow contains two codominant alleles - one fore white hide color and one for red hide color - what would the cow's hide probably look like?
orange
red
patches of white and patches of red
white
Which of the following procedures is based largely on Mendel's research?
performing surgery on a broken arm
treating lung cancer with radiation
breeding a dox for floppy ears
using a microscope to study viruses
The diagram shows a dihybrid cross of two bean plants. Yellow (Y) is the dominant flower color and smooth (S) is the dominant leaf texture.
According to the diagram, what are the chances that the offspring will have
smooth leaves
?
25 percent
50 percent
75 percent
100 percent
By observing more than one type of trait simultaneously over multiple generations, which law did Mendel discover?
the law of co-dominance
the law of multiple alleles
the law of independent assortment
the law of segregation
What are the names of each DNA strand during replication?
up and down
leading and lagging
forward and backward
complete and fragmentary
What determines the genetic code of a region of DNA?
the number of phosphate groups
the order of sugar and phosphate groups
the order of nitrogenous bases
the number of base pairs
What does a chromosome consist of?
tightly wound DNA and proteins
tightly wound DNA only
loosely dispersed DNA
loosely dispersed DNA and proteins
Messenger RNA delivers a "message" from ________ to _________.
DNA; ribosomal RNA
DNA; proteins
ribosomes; transfer RNA
ribosomal RNA; proteins
What molecule begins DNA replication?
helicase
mRNA
RNA polymerase
DNA polymerase
Question 14
14.
Question 15
15.
Other Answer Choices:
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Arginine
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Glutamic acid
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Leucine
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Methionine
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Cystein
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Aspartic acid
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Glycine
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Proline
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Valine
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Threonine
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Asparagine
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Serine
Place the steps of transcription in order:
The DNA strand separates
The mRNA strand moves out of the nucleus
Base pairing forms mRNA
RNA polymerase attaches to the DNA template
Which step begins the process of translation
The ribosome releases the protein and detaches from the mRNA.
tRNA connects an amino acid to the ribosome.
A ribosome reads the codon sequence at the 5' end of mRNA.
A stop codon indicates the end of the polypeptide.
Ligases are enzymes that connect strands of nucleic acids. During which step of protein synthesis are ligases used?
RNA processing
transcription
mutation proofreading
peptide bonding
One reason chromosomal mutations are considered large-scale is because ____________.
they are always passed onto the offspring
they cannot be proofread and fixed
they affect large organisms
they can affect more than one gene
What type of mutation could cause the 3-nucleotide reading frame of tRNA to be shifted?
deletion of one or more nucleotides during replication
incorrect base pairing
replacing an amine group
switching a normal nucleotide for an abnormal one
An autosomal dominant disorder requires _______ in order to affect an individual.
a combination of sex-linked and environmental factors
one copy of a mutated gene
a combination of genetic and environmental factors
two copies of a mutated gene
Which of the following is
NOT
true about X-linked disorders?
They involve mutations along the X chromosome.
They can affect males or females.
An example of one is Rett syndrome.
They only affect males.
Which of the following is an example of an autosomal dominant disorder?
Marfan syndrome
Niemann-Pick disease
Tay-Sachs disease
Williams syndrome
The primary goal of gene therapy is to give a patient
a new, normal single gene
new, normal, reproductive organs
a new, normal cell nucleus
a new, normal single chromosome
Which of the following is not a category of genetic disorders?
chromosomal
environmental
multi-factorial
single-gene
If someone who is homozygous for an autosomal recessive disorder mates with a person who does
NOT
carry the mutated gene, their child will __________.
have a 50 percent chance of developing the disease
have a zero percent chance of developing the disease
have a 25 percent chance of developing the disease
have a 100 percent chance of developing the disease
Which of the following provides the correct sequence for a strand of mRNA that was made to be complementary to the DNA strand?
AUC CAC UGC GUA
ATC CAC TGC GTA
ATG GAG TCG CTA
AUG GAG UCG CUA
Using the codon chart, drop in the correct sequence of amino acids that correspond to the correct mRNA strand.
_______________ -__________________-___________ -____________