Which cellular component will be found in the widest range of organisms in the sample?
The ribosome
, since all organisms need to synthesize proteins
Which of the following conclusions about the radiolabeled amino acid is best supported by the results of the experiment?
Which of the following conclusions about the radiolabeled amino acid is best supported by the results of the experiment?
It was mostly incorporated into proteins that regulate and manage metabolic reactions.
Which of the following best predicts what will happen to the lysosomal enzymes if the proteins that transport H+ ions from the cytosol into the lysosome are damaged ??
Which of the following best predicts what will happen to the lysosomal enzymes if the proteins that transport H+ ions from the cytosol into the lysosome are damaged?
The lysosomal enzymes will not become active, since there will be no active transport of H+ ions
.
What is a major component in cellular membranes?
The principal components of the plasma membrane are
lipids (phospholipids and cholesterol), proteins, and carbohydrate groups
that are attached to some of the lipids and proteins. A phospholipid is a lipid made of glycerol, two fatty acid tails, and a phosphate-linked head group.
Which of the following indicates where testosterone enters a cell and why it is able to cross at that point?
Which of the following indicates where testosterone enters a cell and why it is able to cross at that point?
because testosterone is nonpolar and can diffuse through the membrane
. … Therefore, testosterone can cross the hydrophobic inner region of the phospholipid bilayer.
Which of the following best explains the advantage These projections provide the cell?
Which of the following best explains the advantages of these projections provide the cell?
The projections increase the surface area-to-volume ratio of the cell which allows for more efficient nutrient exchange with the environment
.
What is the most likely mode of transport across the membrane for substance L?
The most likely mode of transport across the membrane for substance L is
active transport
. Active transport moves substances against the concentration gradient from an area of lower concentration to an area of higher concentration.
What statement best describes the cell after 20 minutes?
What statement best describes the cell after 20 minutes?
Water will move from the cell into the beaker, resulting in a smaller cell. Water will move from the beaker into the cell, resulting in a larger cell. Salt will move from the cell into the beaker, resulting in a smaller cell.
Why is the chicken egg best represents the cell in performing the cell transport mechanism?
The membrane of a chicken egg has many similarities to the membrane surrounding animal cells. … This means that
the cell did not use any energy to move things through the membrane
. Another way living cells can move things through the membrane is active transport.
Can testosterone diffuse through the membrane?
How does testosterone enter the cell? Because it is hydrophobic, testosterone
diffuses through the cell membrane
.
What are the 2 major components of cell membranes?
The two major components of cell membranes are
phospholipids and protein
.
Which of the following are the two main components of cellular membranes?
Two main components are
the phospholipid bilayer and the proteins
.
What are major components of cell membranes and are said to be?
The major components of a cell membrane are
phospholipids, glycolipids, proteins, and cholesterol
. The cell membrane contains more protein by mass, but the molar mass of a protein is about 100 times that of a lipid.
Can estrogen diffuse through the membrane?
Steroid hormones estrogen and testosterone are non-polar and
can pass through the lipid bilayer without binding to a membrane receptor
. Nonpolar steroid hormones bind to special receptors in the cell cytoplasm. These receptors are modified and migrate to the cell nucleus where they activate transcription.
What makes testosterone hydrophobic?
Cells put the receptors for peptide hormones in their plasma membranes so the hormones can bind at the cell surface. Steroid hormones, such as testosterone and estrogen, are
lipids
, so they’re hydrophobic (water-fearing) and can pass easily through the hydrophobic layer of the plasma membrane and enter cells.
Which organism does not have a cell wall?
So, the correct answer is
Mycoplasma organism
does not have a cell wall and is the smallest living cell. Note:These organisms do not have the specific shape that is why they are called jokers of the plant kingdom.
