Question #1:
The sugar & phosphate portions of a DNA molecule function
mainly to do which of the following?
A. store & transmit information about an organism’s traits
B. attract the units that are used to create new DNA
molecules
C. provide the structural support for the sequence of
nitrogenous base pairs
D. provide the energy that the molecule needs to carry out
its function
Question #2:
DNA affects the organism’s traits by doing which of the following?
A. directing the assembly of amino acids to form proteins
B. determining which traits will be most beneficial to the
organism
C. establishing the rules by which all of the elements in the
body will form compounds
D. identifying which genetic material should be expressed &
which material discarded
Question #1:
What do these three statements describe?
I. Instructions for translating information into proteins
II. Alignment & sequence of genes on a chromosome
III. Composed of nucleotide triplets
A. protein synthesis
B. the genetic code
C. cell differentiation
D. DNA fingerprinting
Question #2:
Refer to the chart. The triplet codes found in this
chart apply to:
A. humans only.
B. plants & animals.
C. prokaryotes only.
D. all living things.
Question #1:
The diagram shows how a section of protein
containing the amino acid sequence “QYWQ” is
formed. What is the nucleotide sequence of the
mRNA section shown?
5'
3‘
5'
3‘
A. UCGGAUACUACU B. CCACCACCACCA
5'
C. ACUUCGGAUACU
3‘
5'
D. CAGUAUUGGCAA
3'
Question #2:
The illustration shows the transcription process.
What is the main purpose of the structure labeled
W?
A. carrying instructions for protein synthesis
B. transforming into a protein
C. replacing damaged DNA
D. passing traits to offspring
Question #1:
Every cell contains DNA. The main purpose of DNA
is to store the cell’s genetic information. How does
DNA control the cell?
A. DNA activates nerve signals
B. DNA protects the cell from invaders
C. DNA speeds up chemical reactions
D. DNA determines what proteins are made
Question #2:
The base sequence that remains after RNA splicing,
& can be translated into a protein is a/an:
A. exon.
B. deletion.
C. insertion.
D. intron.
Question #1:
A scientist is searching for a chemical that can
alter the characteristics a pea plant will pass on
to its offspring. The scientist needs a chemical
that can affect pea plants in which way?
A. by altering the sequence of
nitrogenous bases in the plant’s DNA
B. by reducing the total number of copies
of the plant’s genetic material
C. by changing the spiral shape of the
plant’s DNA molecules to wheels or horseshoes
D. by adding extra deoxyribose molecules
to each strand of the plant’s genetic material
Question #2:
Mutated DNA in somatic cells
occurs frequently, but this modified DNA
cannot be passed along to
offspring because:
A. modified DNA in somatic cells is
recessive.
B. offspring typically reject modified
DNA.
C. only gamete cells carry genetic
material to offspring.
D. offspring mutations happen only
when somatic cells are diseased.
Question #1:
Look at the Punnett square shown below.
In pea plants, having round peas (R) is dominant
over wrinkled peas (r). Two plants with round (Rr)
peas were crossed. If 4 offspring are produced,
how many offspring are expected to have round
peas?
A. 1
B. 2
C. 3
D. 4
Question #2:
Refer to the diagram. What are the genotypes of the
parents in this cross?
A. TTRr & ttRr
B. TtRr & TtRr
C. TTrr & TtRr
D. TTRr & TtRr
Question #1:
A rat has 42 chromosomes in each somatic cell.
How many chromosomes are in each gamete?
A. 18
B. 21
C. 40
D. 42
Question #2:
The diagram shows the process of meiosis. The
chromosome separation that occurs during meiosis
results in a:
A. single fertilized egg cell.
B. group of genetically identical cells.
C. single sperm cell.
D. reduction in the number of chromosomes
per cell.
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Question #1:
Which of the following is an inappropriate place to gather
information for a karyotype?
A. a sex cell
B. a skin cell
C. a nerve cell
D. a muscle cell
Question #2:
Most species have a standard karyotype. It is common,
however, that there is a difference between males & females
within a species. How does the human karyotype differ
between males & females?
A. males only have 45 chromosomes & females have 46
B. the sex chromosomes in males are XY & in females
they are XX
C. scientists cannot tell the difference but know there is
one
D. males have two satellites attached to their sex
chromosomes