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Biology

Review Questions

BiologyReview Questions

Review Questions

4.

When viewing a specimen through a light microscope, scientists use ________ to distinguish the individual components of cells.

  1. a beam of electrons
  2. radioactive isotopes
  3. special stains
  4. high temperatures
5.

The ________ is the basic unit of life.

  1. organism
  2. cell
  3. tissue
  4. organ
6.

Prokaryotes depend on ________ to obtain some materials and to get rid of wastes.

  1. ribosomes
  2. flagella
  3. cell division
  4. diffusion
7.

Bacteria that lack fimbriae are less likely to ________.

  1. adhere to cell surfaces
  2. swim through bodily fluids
  3. synthesize proteins
  4. retain the ability to divide
8.

Which of the following is surrounded by two phospholipid bilayers?

  1. the ribosomes
  2. the vesicles
  3. the cytoplasm
  4. the nucleoplasm
9.

Peroxisomes got their name because hydrogen peroxide is:

  1. used in their detoxification reactions
  2. produced during their oxidation reactions
  3. incorporated into their membranes
  4. a cofactor for the organelles’ enzymes
10.

In plant cells, the function of the lysosomes is carried out by __________.

  1. vacuoles
  2. peroxisomes
  3. ribosomes
  4. nuclei
11.

Which of the following is found both in eukaryotic and prokaryotic cells?

  1. nucleus
  2. mitochondrion
  3. vacuole
  4. ribosomes
12.

Which of the following is not a component of the endomembrane system?

  1. mitochondrion
  2. Golgi apparatus
  3. endoplasmic reticulum
  4. lysosome
13.

The process by which a cell engulfs a foreign particle is known as:

  1. endosymbiosis
  2. phagocytosis
  3. hydrolysis
  4. membrane synthesis
14.

Which of the following is most likely to have the greatest concentration of smooth endoplasmic reticulum?

  1. a cell that secretes enzymes
  2. a cell that destroys pathogens
  3. a cell that makes steroid hormones
  4. a cell that engages in photosynthesis
15.

Which of the following sequences correctly lists in order the steps involved in the incorporation of a proteinaceous molecule within a cell?

  1. synthesis of the protein on the ribosome; modification in the Golgi apparatus; packaging in the endoplasmic reticulum; tagging in the vesicle
  2. synthesis of the protein on the lysosome; tagging in the Golgi; packaging in the vesicle; distribution in the endoplasmic reticulum
  3. synthesis of the protein on the ribosome; modification in the endoplasmic reticulum; tagging in the Golgi; distribution via the vesicle
  4. synthesis of the protein on the lysosome; packaging in the vesicle; distribution via the Golgi; tagging in the endoplasmic reticulum
16.

Which of the following have the ability to disassemble and reform quickly?

  1. microfilaments and intermediate filaments
  2. microfilaments and microtubules
  3. intermediate filaments and microtubules
  4. only intermediate filaments
17.

Which of the following do not play a role in intracellular movement?

  1. microfilaments and intermediate filaments
  2. microfilaments and microtubules
  3. intermediate filaments and microtubules
  4. only intermediate filaments
18.

Which of the following are found only in plant cells?

  1. gap junctions
  2. desmosomes
  3. plasmodesmata
  4. tight junctions
19.

The key components of desmosomes are cadherins and __________.

  1. actin
  2. microfilaments
  3. intermediate filaments
  4. microtubules
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