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Chapter 4: Q.9 (page 124)

Which of the following is surrounded by two

phospholipid bilayers?

a. the ribosomes

b. the vesicles

c. the cytoplasm

d. the nucleoplasm

Short Answer

Expert verified

The correct answer is option d. the Nucleoplasm

Step by step solution

01

Explanation

Ribosomes are non-membrane-bound organelles as they lack an outer membrane.

A vesicle is a self-contained structure that is surrounded and encased by a single lipid bilayer membrane.

The cytoplasm

is enclosed by the cytoplasmic membrane is made up of a semipermeable lipid bilayer.

Nucleoplasm is a gel-like substance within a cell membrane, it consists of two phospholipid bilayers; inner membrane and outer membrane.

02

Final Answer

Nucleoplasm has a phospholipid bilayer which works as a barrier, preventing chemicals and ions from entering and leaving the cell.

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Most popular questions from this chapter

When viewing a specimen through a light microscope,

scientists use ________ to distinguish the individual

components of cells.

a. a beam of electrons

b. radioactive isotopes

c. special stains

d. high temperatures

What are the structural and functional similarities and differences between mitochondria and chloroplasts?

Bacteria that lack fimbriae are less likely to ________.

a. adhere to cell surfaces

b. swim through bodily fluids

c. synthesize proteins

d. retain the ability to divide

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

a. protein synthesis of the protein on the ribosome; modification in the Golgi apparatus; packaging in the endoplasmic reticulum; tagging in the vesicle

b. synthesis of the protein on the lysosome; tagging in the Golgi; packaging in the vesicle; distribution in the endoplasmic reticulum

c. synthesis of the protein on the ribosome; modification in the endoplasmic reticulum; tagging in the Golgi; distribution via the vesicle

d. synthesis of the protein on the lysosome; packaging in the vesicle; distribution via the Golgi; tagging in the endoplasmic reticulum

Pathogenic E. coli have recently been shown to degrade tight junction proteins during infection. How would this provide an advantage to the bacteria?
See all solutions

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