Start learning →

CSIR NET Cell Structure — practice questions — page 3

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

Practise Cell Structure with Quill →

Cell Structure questions and exercises with answers

Showing questions 61–90 of 135.

When cells do not get enough oxygen, the small amount of ATP made is accompanied by which product?Read the answer and worked solution →Peroxisomes are enclosed by how many membranes, and carry out which reactions?Read the answer and worked solution →Why are peroxisomes named for hydrogen peroxide?Read the answer and worked solution →Glyoxysomes, the specialized peroxisomes of plants, carry out which conversion?Read the answer and worked solution →Apart from size, what distinguishes a vacuole from a vesicle?Read the answer and worked solution →How does the pH inside a lysosome compare with the pH of the cytoplasm?Read the answer and worked solution →In plant cells, which structure carries out the digestive work done by lysosomes in animal cells?Read the answer and worked solution →Which pair of structures is present in animal cells but absent from plant cells?Read the answer and worked solution →Which set of structures is found in plant cells but not in animal cells?Read the answer and worked solution →Each centriole is built as a cylinder of which arrangement of microtubules?Read the answer and worked solution →Which observation shows that centrioles are not essential for cell division?Read the answer and worked solution →Which polysaccharide is the major organic molecule of the plant cell wall?Read the answer and worked solution →Besides plants and prokaryotes, which cells are described as having cell walls?Read the answer and worked solution →What is a single stack of thylakoids inside a chloroplast called?Read the answer and worked solution →Which name is given to the fluid enclosed by the chloroplast inner membrane around the grana?Read the answer and worked solution →Which pigment inside chloroplasts captures the light energy for photosynthesis?Read the answer and worked solution →How does photosynthesis in some bacteria differ from photosynthesis in plants?Read the answer and worked solution →Which relationship does the term endosymbiosis describe?Read the answer and worked solution →Which observation is offered as evidence for the endosymbiotic origin of mitochondria?Read the answer and worked solution →Why does a plant wilt when it is not watered for several days?Read the answer and worked solution →How does the central vacuole let a plant cell enlarge cheaply?Read the answer and worked solution →Which structure is not part of the endomembrane system?Read the answer and worked solution →Which two jobs does the endoplasmic reticulum divide between its rough and smooth regions?Read the answer and worked solution →The membrane of the endoplasmic reticulum is continuous with which structure?Read the answer and worked solution →What is the hollow interior of the endoplasmic reticulum tubules called?Read the answer and worked solution →What gives the rough endoplasmic reticulum its studded appearance?Read the answer and worked solution →What happens to newly synthesized proteins once they enter the lumen of the rough ER?Read the answer and worked solution →Besides modifying proteins, what does the rough ER manufacture?Read the answer and worked solution →Which cell would carry the greatest concentration of smooth endoplasmic reticulum?Read the answer and worked solution →The specialized smooth ER of muscle cells stores which ion?Read the answer and worked solution →

Worked practice questions

When cells do not get enough oxygen, the small amount of ATP made is accompanied by which product?

  1. A build-up of lactic acid
  2. A build-up of nitric oxide
  3. A build-up of uric acid
  4. A build-up of ethyl ether
Show answer and solution

Correct answer: A. A build-up of lactic acid

1. Muscle cells hold a very high concentration of mitochondria because movement demands energy. 2. When cells do not get enough oxygen they cannot make much ATP. 3. The small amount they do make in the absence of oxygen comes with the production of lactic acid. 4. Carbon dioxide is the waste of oxygen-using respiration, so it is not what marks the oxygen-poor route. 5. Lactic acid accompanies the low-oxygen output. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.3 Eukaryotic Cells_

Open this question →

Peroxisomes are enclosed by how many membranes, and carry out which reactions?

  1. Two membranes, reduction reactions
  2. One membrane, oxidation reactions
  3. Two membranes, hydrolysis reactions
  4. One membrane, photosynthetic steps
Show answer and solution

Correct answer: B. One membrane, oxidation reactions

1. Peroxisomes are small, round organelles enclosed by single membranes. 2. They carry out oxidation reactions that break down fatty acids and amino acids. 3. They also detoxify many poisons that may enter the body, and alcohol is detoxified by peroxisomes in liver cells. 4. Double membranes belong to mitochondria, chloroplasts and the nuclear envelope, not to peroxisomes. 5. One membrane and oxidation reactions is the correct pairing. 6. Hydrolysis is the lysosome's chemistry, so pairing it with a peroxisome gets both the membrane count and the reaction wrong. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.3 Eukaryotic Cells_

Open this question →

Why are peroxisomes named for hydrogen peroxide?

  1. It is used up in their detox steps
  2. It is produced by their oxidations
  3. It is built into their membranes
  4. It acts as a cofactor for enzymes
Show answer and solution

Correct answer: B. It is produced by their oxidations

1. Peroxisomes run oxidation reactions on fatty acids and amino acids. 2. Many of those oxidation reactions release hydrogen peroxide. 3. Hydrogen peroxide would damage the cell, so confining these reactions inside the organelle protects the cytoplasm. 4. Enzymes inside then safely break the hydrogen peroxide down into oxygen and water. 5. The organelle is named because its oxidations produce hydrogen peroxide. 6. Hydrogen peroxide is an output that must be neutralized, not an input consumed or a cofactor required, so the other answers all reverse its role. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.3 Eukaryotic Cells_

Open this question →

How to practise

  1. Choose a Cell Structure question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

More Biology topics

Genes and ProteinsBiological Macromolecules