Zoo 250 Peak Test 1 Review Exam 2023 Questions and
Answers 100% Verified
In the fluid mosaic model, these molecules make up the bilayer found in the cell
membrane
Phospholipids
This membrane protein, made of glycoproteins and glycolipids, allows cells to
identify one another or other molecules:
Marker molecules
These channel proteins are always open and are responsible for the permeability
of the plasma membrane to ions
Nongated ion channels
Receptors Linked to G Protein Complexes can stimulate a cell response in this
manner
1. By opening ion channels
2 by activation ions
3 by means of intracellular chemical signals
This genetic disorder causes failure of chloride ion channels and results on cells
producing a think secretion which profoundly affects the lungs making breathing
difficult
Cystic fibrosis
The movement of a solution across a plasma membrane because of a pressure
gradient is called ______
Filtration
A red blood cell is placed into an unknown solution. Later the cells appear to be
swollen and some have burst. You conclude that the solution is
Hypotonic
These substances may diffuse directly through the lipid bilayer of the cell
membrane
Carbon dioxide and oxygen
The sodium-potassium pump preforms this function
1. Uses atp
2 moves sodium ions out of the cell
3 moves potassium ions into the cell
(T/F) Phagocytosis requires ATP, does not exhibit saturation and transports
liquid substances across the cell membrane
False
This organelle produces large amounts of ATP
mitochondria
Ribosomal subunits are manufactured by the _____.
Nucleolus
The Golgi apparatus produces vesicles which contain proteins that can
, 1 be secreted by exocytosis
2 become part of the plasma membrane
3 be enzymes that are used within the cells
(T/F) Enzymes found inside lysosomes digest phagocytized bacteria,
nonfunctional organelles, nuclei acids, proteins and lipids
True
Cells that synthesize large amounts of lipids would have this:
Large amounts of smooth ER
In the process of transcription, mRNA is copied from
DNA
This can be said of translation
This sequence of nucleotides is the anticodon for AUG (methionine)
UAC
During DNA replication, the enzyme adds new nucleotides to the existing
template
DNA polymerase
This event is NOT a result of mitosis
2 haploid cells are formed
Two or more genes that occupy the same focus on a chromosome are called this
Allele
This genotype is homozygous dominant
AA
This is an example of codominance in which all 3 alleles are expressed at the
same time
ABO blood groups
This disorder is caused by having an extra chromosome #21 and results in a
mental retardation, short stature and a shortened life span
Down syndrome
This can be said of the X-linked trait hemophilia
If a male has the recessive allele, he will be a hemophiliac
a female must have 2 recessive alleles in order to be a hemophiliac
These are properties of epithelium:
1. Covers body surfaces and lines cavities
2. It's basement membrane anchors it to deeper tissues
This tissue only has one layer of cells
simple epithelium
These cells function to filter and to allow substances to diffuse through them
Squamous cells
This tissue, which makes up the skin, serves as a barrier to infection, protection
against abrasions and water loss
Stratified squamous epithelium
This structure binds epithelial cells to the basement membrane
Hemidesmosomes
(T/F) the distinguishing characteristics of connective tissue is that it consist of
cells separated by abundant extra cellular matrix
True
Answers 100% Verified
In the fluid mosaic model, these molecules make up the bilayer found in the cell
membrane
Phospholipids
This membrane protein, made of glycoproteins and glycolipids, allows cells to
identify one another or other molecules:
Marker molecules
These channel proteins are always open and are responsible for the permeability
of the plasma membrane to ions
Nongated ion channels
Receptors Linked to G Protein Complexes can stimulate a cell response in this
manner
1. By opening ion channels
2 by activation ions
3 by means of intracellular chemical signals
This genetic disorder causes failure of chloride ion channels and results on cells
producing a think secretion which profoundly affects the lungs making breathing
difficult
Cystic fibrosis
The movement of a solution across a plasma membrane because of a pressure
gradient is called ______
Filtration
A red blood cell is placed into an unknown solution. Later the cells appear to be
swollen and some have burst. You conclude that the solution is
Hypotonic
These substances may diffuse directly through the lipid bilayer of the cell
membrane
Carbon dioxide and oxygen
The sodium-potassium pump preforms this function
1. Uses atp
2 moves sodium ions out of the cell
3 moves potassium ions into the cell
(T/F) Phagocytosis requires ATP, does not exhibit saturation and transports
liquid substances across the cell membrane
False
This organelle produces large amounts of ATP
mitochondria
Ribosomal subunits are manufactured by the _____.
Nucleolus
The Golgi apparatus produces vesicles which contain proteins that can
, 1 be secreted by exocytosis
2 become part of the plasma membrane
3 be enzymes that are used within the cells
(T/F) Enzymes found inside lysosomes digest phagocytized bacteria,
nonfunctional organelles, nuclei acids, proteins and lipids
True
Cells that synthesize large amounts of lipids would have this:
Large amounts of smooth ER
In the process of transcription, mRNA is copied from
DNA
This can be said of translation
This sequence of nucleotides is the anticodon for AUG (methionine)
UAC
During DNA replication, the enzyme adds new nucleotides to the existing
template
DNA polymerase
This event is NOT a result of mitosis
2 haploid cells are formed
Two or more genes that occupy the same focus on a chromosome are called this
Allele
This genotype is homozygous dominant
AA
This is an example of codominance in which all 3 alleles are expressed at the
same time
ABO blood groups
This disorder is caused by having an extra chromosome #21 and results in a
mental retardation, short stature and a shortened life span
Down syndrome
This can be said of the X-linked trait hemophilia
If a male has the recessive allele, he will be a hemophiliac
a female must have 2 recessive alleles in order to be a hemophiliac
These are properties of epithelium:
1. Covers body surfaces and lines cavities
2. It's basement membrane anchors it to deeper tissues
This tissue only has one layer of cells
simple epithelium
These cells function to filter and to allow substances to diffuse through them
Squamous cells
This tissue, which makes up the skin, serves as a barrier to infection, protection
against abrasions and water loss
Stratified squamous epithelium
This structure binds epithelial cells to the basement membrane
Hemidesmosomes
(T/F) the distinguishing characteristics of connective tissue is that it consist of
cells separated by abundant extra cellular matrix
True
