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Chapter 1: Problem 7

What is the main function of the nucleolus? a. Ribosomal RNA synthesis b. DNA replication c. Cell division d. Chromosome assembly

Short Answer

Expert verified
a. Ribosomal RNA synthesis

Step by step solution

01

Identify the Question

Determine what is being asked. The question is asking for the main function of the nucleolus in a cell.
02

Understand the Role of the Nucleolus

Research the function of the nucleolus. The nucleolus is a region found within the cell nucleus and is involved in producing and assembling components necessary for ribosome production.
03

Analyze the Options

Consider each provided option: a. Ribosomal RNA synthesis b. DNA replication c. Cell division d. Chromosome assembly. Review how each option relates to the nucleolus' function.
04

Select the Correct Answer

Based on the understanding that the nucleolus is primarily involved in the synthesis and partial assembly of ribosomal RNA (rRNA), identify option 'a' as the correct answer.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

ribosomal RNA synthesis
Ribosomal RNA synthesis takes place within the nucleolus, a specialized region inside the cell nucleus. The nucleolus is crucial for creating ribosomal RNA (rRNA), which is a vital component of ribosomes. Ribosomes are the cellular machinery responsible for making proteins. During ribosomal RNA synthesis, the genes coding for rRNA are transcribed to produce large RNA molecules. These RNA molecules then combine with proteins to form the subunits of ribosomes. Without this process, cells couldn't make proteins efficiently, impacting essential functions.
Let's summarize:
  • Occurs in the nucleolus
  • Essential for producing ribosomes
  • Crucial for protein synthesis
nucleolus role
The nucleolus plays a vital role in the cell by being the center for ribosome production and assembly. This region of the nucleus is distinct from other parts due to its high RNA content and specific structure. The main function of the nucleolus is to create and assemble ribosomal RNA and ribosome subunits. Additionally, the nucleolus helps in the synthesis of certain proteins.
Key functions of the nucleolus include:
  • Producing ribosomal RNA (rRNA)
  • Assembling ribosome subunits
  • Facilitating protein synthesis
The nucleolus ensures cells have the ribosomes needed to create proteins, which are crucial for nearly all cellular activities.
cell biology
Cell biology is the study of cell structure, function, and processes. It covers various aspects such as how cells grow, divide, and die. Understanding cell biology helps us learn how different types of cells contribute to the living organisms' overall function. One key area in cell biology is understanding the specialized regions within cells, like the nucleolus.
Important areas of cell biology include:
  • Cell structure and organelles
  • Cell division and growth
  • Protein synthesis and genetic material
The nucleolus is one of these specialized regions, with a distinct role in ribosomal RNA synthesis and ribosome production.
Knowing how the nucleolus functions helps in understanding the bigger picture of how cells operate and maintain life processes.

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Most popular questions from this chapter

A bacterial cell is noted to be resistant to penicillin. The bacterium is transferred to a colony that lacks the fertility factor, and the rest of the colony does not become resistant to penicillin. However, the penicillin-resistant cell has also started to exhibit other phenotypic characteristics, including secretion of a novel protein. Which of the following methods of bacterial recombination is NOT likely to account for this change? a. Conjugation b. Transformation c. Transduction d. Infection with a bacteriophage

Resistance to antibiotics is a well-recognized medical problem. Which mechanism(s) can account for a bacterium's ability to increase its genetic variability and thus adapt itself to resist different antibiotics? Binary fission Conjugation Transduction a. I and II only b. I and III only c. Il and III only d. I, II, and III

Which of the following activities occurs in the Golgi apparatus? a. Synthesis of proteins b. Modification and distribution of proteins c. Breakdown of lipids and carbohydrates d. Production of ATP

Which of the following is NOT a difference that would allow one to distinguish a prokaryotic and a eukaryotic cell? a. Ribosomal subunit weight b. Presence of a nucleus c. Presence of a membrane on the outside surface of the cell d. Presence of membrane-bound organelles

Herpes simplex virus (HSV) enters the human body and remains dormant in the nervous system until it produces an outbreak after exposure to heat, radiation, or other stimuli. Which of the following statements correctly describes HSV? a. While it remains dormant in the nervous system, the virus is in its lytic cycle. b. During an outbreak, the virus is in the lysogenic cycle. c. Herpes simplex virus adds its genetic information to the genetic information of the cell. d. The herpes simplex virus contains a tail sheath and tail fibers.
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