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2024 STRAIGHTERLINE BIO 101 TEST EXAM WITH CORRECT ANSWERS
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2024 STRAIGHTERLINE BIO 101TEST EXAM WITH CORRECT
ANSWERS
According to the fluid-mosaic model of membrane structure, - CORRECT
ANSWERS-proteins float inside or within the phospholipid bilayer
Following a cut or scrape, which process repairs your skin? - CORRECT
ANSWERS-mitosis
Which of the following is not true of the chromosomes in a cell undergoing
mitosis? - CORRECT ANSWERS-They are available for RNA synthesis.
The cell cycle consists of - CORRECT ANSWERS-mitosis and interphase
In humans, the diploid number of chromosomes is - CORRECT ANSWERS-46
Which type of genes, when abnormally activated so that protein is always
present and active, can result in cancer? - CORRECT ANSWERS-proto-
oncogenes
During interphase, - CORRECT ANSWERS-hereditary material duplicates
itself.
What is the difference between the chromosomes in a secondary
spermatocyte and those in a spermatid? - CORRECT ANSWERS-the
chromosomes in secondary spermatocytes consist of two chromatids, the
ones in the spermatid consist of only one chromatid
A basic difference between spermatogenesis and oogenesis is that in
oogenesis - CORRECT ANSWERS-one functional egg is produced.
Which of the following crosses will yield four phenotypes in a ratio of 9:3:3:1?
- CORRECT ANSWERS-RrYy × RrYy
In 1940, two researchers named Weiner and Landsteiner discovered that
about 85 percent of the human population sampled possessed a blood cell
protein called the Rh factor. The presence of Rh factor was labeled Rh
positive (Rh+) and was found to be dominant over the absence of the blood
factor (Rh-). Under normal Mendelian inheritance, which of the following
, statements is/are FALSE? - CORRECT ANSWERS-Two Rh- parents could have
an Rh+ child.
Which of the following is an example of the blending of phenotypes? -
CORRECT ANSWERS-incomplete dominance
Huntington disease is an autosomal dominant disorder that leads to
progressive degeneration of brain cells. There is no effective treatment for
the disorder and individuals usually die in their 40s or 50s, 10 to 15 years
after the onset of symptoms. Which of these statements about Huntington
disease is true? - CORRECT ANSWERS-Huntington disease usually appears
during middle age.
Which genetic disorder is associated with a defect in the elastic connective
tissue protein called fibrillin? - CORRECT ANSWERS-Marfan syndrome
Which genetic disorder is associated with an irregular shape of the red blood
cells? - CORRECT ANSWERS-sickle cell disease
All the genes on one chromosome tend to be inherited together and are
therefore called a - CORRECT ANSWERS-linkage group
Considering that males can have Klinefelter (XXY) syndrome, XYY, and
normal XY chromosomal combinations, and females can have Turner (XO)
syndrome, poly-X (XXX, XXXX), and normal XX combinations, it is obvious
that - CORRECT ANSWERS-maleness results from the minimal presence of
one Y chromosome.
If there is complete linkage with genes Ss (for smooth or wrinkled seeds) and
Gg (for green or yellow seeds), what phenotypes would you expect in the
offspring of a cross with one heterozygous parent (Ss, Gg), which would all
produce all smooth and green seeds, and a homozygous recessive parent
(ss, gg), which would produce all wrinkled yellow seeds? - CORRECT
ANSWERS-smooth green seeds or wrinkled yellow seeds only
Nutrient molecules are used to build cellular structures or for energy. This
best represents which characteristic of life? - CORRECT ANSWERS-Living
things acquire materials and energy from the environment
Organs are composed of tissues, which are composed of cells. This is an
example of which characteristic of life? - CORRECT ANSWERS-Living things
have levels of hierarchical organization
The smallest unit that has all of the characteristics of life is the - CORRECT
ANSWERS-cell
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