1.Which of the following scenarios correctly describe a major role of plasma mem
ID: 92628 • Letter: 1
Question
1.Which of the following scenarios correctly describe a major role of plasma membrane proteins?(SELECT ANY TRUE STATEMENTS.)
A protein that helps store DNA in the nucleus
A protein traveling in the bloodstream to act as a hormone
A protein that helps transports water soluble molecules through the cell membrane
A protein that transports oxygen and carbon dioxide (gases) though the cell membrane
2.A couple decides to have a baby. The woman elects to have an amniocentesis performed. The genetic counselor determines the baby has two copies of the Sickle cell gene and will therefore suffer from Sickle Cell Anemia. What is a gene?
A strand of RNA that codes for a particular polypeptide sequence
A noncoding segment of DNA
A three-base triplet that specifies a specific amino acid
A segment of DNA that carries the instructions for one polypeptide chain
3. You decide to eat raw chicken. A white blood cell (macrophage) phagocytizes a bacterium (e.g. Salmonella) in your body, saving your life for a short period of time. Once the bacterium is taken into the white blood cell, what organelle digests the solid material?
Rough Endoplasmic reticulum
Nucleus
Golgi apparatus
Nucleolus
Peroxisome
Ribosome
Lysosome
4. A mature brain cell (neuron) is metabolically active and functional. It is likely in:
Anaphase
Telophase
Metaphase
Interphase
Prophase
Cytokinesis
Explanation / Answer
1. Which of the following scenarios correctly describe a major role of plasma membrane proteins?
Ans: A protein that helps transports water soluble molecules through the cell membrane
A plasma membrane bound transport protein is a membrane protein which provides a passage for ions, small molecules, or macromolecules, like other protein, across plasma membrane.
2. A couple decides to have a baby. The woman elects to have an amniocentesis performed. The genetic counsellor determines the baby has two copies of the Sickle cell gene and will therefore suffer from Sickle Cell Anemia. What is a gene?
Ans: A segment of DNA that carries the instructions for one polypeptide chain.
3. You decide to eat raw chicken. A white blood cell (macrophage) phagocytizes a bacterium (e.g. Salmonella) in your body, saving your life for a short period of time. Once the bacterium is taken into the white blood cell, what organelle digests the solid material?
Ans: Lysosome
By phagocytosis process WBCs engulf extracellular bacteria which is then degraded by the lysosome inside cell by forming phagolysosme.
4. A mature brain cell (neuron) is metabolically active and functional. It is likely in:
Ans: Interphase
All mature neurones are in G0 phase.
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