The centrosome is a type of Microtubule Organisation Centre. A centrosome contains a pair of (a)______ . A centriole consists of stable fused (b) _________ Centrosomes form at the (c)_____________ of cells. (d) _________ microtubules att
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The centrosome is a type of Microtubule Organisation Centre. A centrosome contains a pair of (a)______ . A centriole consists of stable fused (b) _________ Centrosomes form at the (c)_____________ of cells. (d) _________ microtubules attach the centrosome to the (e)___________.
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- Identify the false statement about centrioles. (a) They start to duplicate in G1. (b) They lie in the centrosome. (c) They are made of microtubules. (d) They are membrane-walled barrels lying parallel to each other.The inner nuclear membrane is lined by the nuclear lamina, a filamentous network which serves as an attachment site for chromatin and structural support and possibly other functions. a) True b) FalseWhen proteins move cargo throughout the cell, they do so via the (a) __________ of the cytoskeleton. These proteins are composed of double (b)_________ which allow roation. Each 'head' can attach to the microtubule when bound to (c)_____________ . When ATP is hydrolysed, there is a (d) ____________ where the angle of the head changes and the cargo moves along the microtubule. Then, the second head binds and the process repeats.
- In all cells, microtubules nucleate from the centrosome and then become stabilized or collapse. What feature of microtubules contributes to this phenomenon?1. Lysosome is regarded as a body that is covered by membrane, a little smaller than mitochondrion and functions as storage for several hydrolytic enzymes. The enzymes in lysosome can digest substances that are engulfed by the cell and under certain conditions can destroy the cell itself. (a) Name ONE type of cell in the human body that contains many lysosomes. Explain why the cell contains many lysosomes. (b) State ONE different between the lysosome membrane and the mitochondrion membrane. (c) State ONE special feature of the lysosome membrane. (d) Explain how lysosome acts to release its enzymes in the cell.a) Are actin filaments subject to the same "dynamic instability" as microtubules? Yes or no? b)Explain how both actin and microtubules polymerize and depolymerize.
- Name the parts of a cell in which the following organelles exist: (a) centrioles, (b) microtubules, (c) nuclear envelope, (d) chromatin. What are their functions?The cisternal space of ER is continuous with prenuclear space between the two membranes of the nuclear envelope and can communicate with the internals spaces of the Golgi complex and lysosome by means of _____________ that shuttle between these structures. Which of the following experimental observations would suggest that chromosomes move by polymerization of tubulin subunits?Which of the following best describes the pH of the lysosomal interior? a.) The interior of a lysosome generally has a pH similar to cytoplasm b.) The interior of a lysosome generally has a pH higher than cytoplasm c.) The interior of a lysosome generally has a pH lower than cytoplasm
- The trans face of the Golgi apparatus (a) is its convex face; (b) is where products leave the Golgi apparatus in vesicles; (c) receives transport vesicles from the rough ER; (d) is in the very center of the Golgi stack; (e) is the same as the cis face.A.......... is the condensed, visible form of chromatin.The nuclear membrane is lined by the chromatin and structural support. a) Kash and Sun filaments b) elastin and collagen c) nuclear lamina a filamentous network which serves as an attachment site for