GRE Subject Test: Biochemistry, Cell, and Molecular Biology › Cell Biology
Gram positive bacteria have __________ cell wall(s) and Gram negative bacteria have __________ cell wall(s).
one . . . one
one . . . two
two . . . one
two . . . two
Gram stain is a laboratory technique used to distinguish bacteria. Gram positive and Gram negative bacteria are distinguished based on their cell walls. Gram positive bacteria have a single thick cell wall (outside its cell membrane). Upon Gram staining, these bacteria will hold the Gram stain because of their thick cell wall. The Gram negative bacteria also have only one cell wall; however, it is a lot thinner and is sandwiched between two cell membranes. The thin nature of the cell wall makes it easier for the Gram stain to leak out of the bacterial cell.
Gram positive bacteria have __________ cell wall(s) and Gram negative bacteria have __________ cell wall(s).
one . . . one
one . . . two
two . . . one
two . . . two
Gram stain is a laboratory technique used to distinguish bacteria. Gram positive and Gram negative bacteria are distinguished based on their cell walls. Gram positive bacteria have a single thick cell wall (outside its cell membrane). Upon Gram staining, these bacteria will hold the Gram stain because of their thick cell wall. The Gram negative bacteria also have only one cell wall; however, it is a lot thinner and is sandwiched between two cell membranes. The thin nature of the cell wall makes it easier for the Gram stain to leak out of the bacterial cell.
Gram positive bacteria have __________ cell wall(s) and Gram negative bacteria have __________ cell wall(s).
one . . . one
one . . . two
two . . . one
two . . . two
Gram stain is a laboratory technique used to distinguish bacteria. Gram positive and Gram negative bacteria are distinguished based on their cell walls. Gram positive bacteria have a single thick cell wall (outside its cell membrane). Upon Gram staining, these bacteria will hold the Gram stain because of their thick cell wall. The Gram negative bacteria also have only one cell wall; however, it is a lot thinner and is sandwiched between two cell membranes. The thin nature of the cell wall makes it easier for the Gram stain to leak out of the bacterial cell.
Gram positive bacteria have __________ cell wall(s) and Gram negative bacteria have __________ cell wall(s).
one . . . one
one . . . two
two . . . one
two . . . two
Gram stain is a laboratory technique used to distinguish bacteria. Gram positive and Gram negative bacteria are distinguished based on their cell walls. Gram positive bacteria have a single thick cell wall (outside its cell membrane). Upon Gram staining, these bacteria will hold the Gram stain because of their thick cell wall. The Gram negative bacteria also have only one cell wall; however, it is a lot thinner and is sandwiched between two cell membranes. The thin nature of the cell wall makes it easier for the Gram stain to leak out of the bacterial cell.
Which of the following is false with regard to the LDL-receptor?
Once bound to cargo, it enters the cell via COPII-mediated endocytosis
It is shuttled back to the cell surface after it delivers its cargo
It releases its cargo in the low pH environment of the endosome
Its cargo is low density lipoprotein
The LDL-receptor enters the cell via clathrin-mediated endocytosis, not COPII. COPII is involved in budding off of the endoplasmic reticulum.
All of the other given answer options are true.
Which of the following is false with regard to the LDL-receptor?
Once bound to cargo, it enters the cell via COPII-mediated endocytosis
It is shuttled back to the cell surface after it delivers its cargo
It releases its cargo in the low pH environment of the endosome
Its cargo is low density lipoprotein
The LDL-receptor enters the cell via clathrin-mediated endocytosis, not COPII. COPII is involved in budding off of the endoplasmic reticulum.
All of the other given answer options are true.
Which of the following is false with regard to the LDL-receptor?
Once bound to cargo, it enters the cell via COPII-mediated endocytosis
It is shuttled back to the cell surface after it delivers its cargo
It releases its cargo in the low pH environment of the endosome
Its cargo is low density lipoprotein
The LDL-receptor enters the cell via clathrin-mediated endocytosis, not COPII. COPII is involved in budding off of the endoplasmic reticulum.
All of the other given answer options are true.
Which of the following is false with regard to the LDL-receptor?
Once bound to cargo, it enters the cell via COPII-mediated endocytosis
It is shuttled back to the cell surface after it delivers its cargo
It releases its cargo in the low pH environment of the endosome
Its cargo is low density lipoprotein
The LDL-receptor enters the cell via clathrin-mediated endocytosis, not COPII. COPII is involved in budding off of the endoplasmic reticulum.
All of the other given answer options are true.
Which of the following is true regarding microfilaments?
They are the smallest of the cytoskeletal elements
They always have a 9+2 arrangement
They are made up of myosin and actin
More than one of these are true
Microfilaments are the smallest of the three cytoskeletal elements and are made up of actin filaments (myosin is not found in microfilaments). The 9+2 arrangement is found in microtubules, the biggest cytoskeletal elements. The third cytoskeletal element is called the intermediate filament and is made up of related proteins unique to each intermediate filament.
Which of the following is true regarding microfilaments?
They are the smallest of the cytoskeletal elements
They always have a 9+2 arrangement
They are made up of myosin and actin
More than one of these are true
Microfilaments are the smallest of the three cytoskeletal elements and are made up of actin filaments (myosin is not found in microfilaments). The 9+2 arrangement is found in microtubules, the biggest cytoskeletal elements. The third cytoskeletal element is called the intermediate filament and is made up of related proteins unique to each intermediate filament.