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CSIR NET Cell Structure — practice questions — page 4

Explore 135 free Cell Structure questions in CSIR NET Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Cell Structure questions and exercises with answers

Showing questions 91–120 of 135.

Heart failure is described as arising from a malfunction of which structure in cardiac muscle cells?Read the answer and worked solution →Which set of tasks takes place in the Golgi apparatus?Read the answer and worked solution →Vesicles arriving from the endoplasmic reticulum fuse with which face of the Golgi?Read the answer and worked solution →Which sequence correctly orders the handling of a protein inside the cell?Read the answer and worked solution →What is the most frequent modification made to proteins inside the Golgi?Read the answer and worked solution →After modification in the Golgi, proteins and lipids are tagged with what, so they can be routed?Read the answer and worked solution →What extra role does the Golgi apparatus play in plant cells?Read the answer and worked solution →Which cells would carry an abundance of Golgi apparatus?Read the answer and worked solution →In Lowe disease, the deficient enzyme normally sits in which organelle?Read the answer and worked solution →Lowe disease is caused by a mutation on which chromosome?Read the answer and worked solution →What is the process in which a macrophage folds in its plasma membrane and engulfs a pathogen?Read the answer and worked solution →After a macrophage engulfs a bacterium, the resulting vesicle fuses with what?Read the answer and worked solution →From which membranes are lysosomes formed?Read the answer and worked solution →Which functions does the cytoskeleton perform?Read the answer and worked solution →What is the approximate diameter of a microfilament?Read the answer and worked solution →Intermediate filaments take their name from a diameter in which range?Read the answer and worked solution →What diameter is given for microtubules, the widest cytoskeletal element?Read the answer and worked solution →Microfilaments are built from two intertwined strands of which globular protein?Read the answer and worked solution →Actin filaments serve as a track for the movement of which motor protein?Read the answer and worked solution →Cytoplasmic streaming, driven by actin, is described as which kind of movement?Read the answer and worked solution →Which statement describes the role of intermediate filaments?Read the answer and worked solution →Which fibrous protein of the intermediate filaments strengthens hair, nails and skin?Read the answer and worked solution →Which shape are microtubules described as having?Read the answer and worked solution →Which two cytoskeletal elements can disassemble and reform quickly?Read the answer and worked solution →Which task is performed by microtubules?Read the answer and worked solution →In animal cells, which structure serves as the microtubule-organizing center?Read the answer and worked solution →How do cilia differ from flagella in length and number on a cell?Read the answer and worked solution →The 9 plus 2 array of a eukaryotic flagellum consists of which arrangement?Read the answer and worked solution →Cilia lining the respiratory tract perform which job?Read the answer and worked solution →Which protein is the most abundant component of the extracellular matrix?Read the answer and worked solution →

Worked practice questions

Heart failure is described as arising from a malfunction of which structure in cardiac muscle cells?

  1. The mitochondrial cristae
  2. The endoplasmic reticula
  3. The Golgi trans faces
  4. The gap junction pores
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Correct answer: B. The endoplasmic reticula

1. Heart failure does not mean the heart has stopped, but that it cannot pump with sufficient force. 2. Contractile force in a muscle cell depends on the supply of calcium ions. 3. Calcium ions are stored by the endoplasmic reticulum of the muscle cell. 4. Heart failure occurs when the endoplasmic reticula of cardiac muscle cells do not function properly. 5. The result is an insufficient number of calcium ions to trigger a sufficient contractile force. 6. Cristae serve respiration and gap junction pores carry the electrical signal, so neither is the structure named as failing. 7. The malfunctioning structure is the endoplasmic reticulum. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.4 The Endomembrane System and Proteins_

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Which set of tasks takes place in the Golgi apparatus?

  1. Copying, editing, splicing, exporting
  2. Oxidizing, reducing, storing, cooling
  3. Sorting, tagging, packaging, distributing
  4. Digesting, recycling, killing, absorbing
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Correct answer: C. Sorting, tagging, packaging, distributing

1. Lipids and proteins arriving in transport vesicles still need to be sorted, packaged and tagged. 2. That work is done in the Golgi apparatus, a series of flattened membranes. 3. Sorting, tagging, packaging and distribution of lipids and proteins all take place there. 4. Digesting and recycling belong to the lysosome, so that answer names another organelle's work. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.4 The Endomembrane System and Proteins_

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Vesicles arriving from the endoplasmic reticulum fuse with which face of the Golgi?

  1. The medial face
  2. The trans face
  3. The lumen face
  4. The cis face
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Correct answer: D. The cis face

1. The Golgi has a receiving side and an opposite side. 2. The receiving side is the cis face and the opposite side is the trans face. 3. Transport vesicles formed from the ER travel to the cis face and fuse with it there. 4. They empty their contents into the lumen of the Golgi apparatus. 5. Vesicles bud out from the trans face, so that face is the exit rather than the entrance. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.4 The Endomembrane System and Proteins_

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