Cell Biology: Nucleus Introduction

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15 Questions

Which of the following structures is responsible for transporting biomolecules between the nucleoplasm and the cytoplasm?

Nuclear pores

What is the primary protein component of chromatin?

Histones

Which term refers to the condensed form of chromatin?

Heterochromatin

What is the site of formation of ribosomal constituents inside the nucleus?

Nucleolus

What maintains the nucleus's shape and acts as a framework upon which chromatin is organized?

Nuclear matrix

Which of the following classes of ribosomes contains a long 28 S rRNA chain with 4700 nucleotides?

Eukaryotic ribosomes

What is the sedimentation constant of prokaryotic ribosomes?

70S

How many ribosomal proteins are present in the small subunit of prokaryotic ribosomes?

21

Which type of ribosomes has small 30S and large 50S subunits, together forming a 80S mitoribosome?

Chloroplast ribosomes

What is the main role of ribosomes?

Protein synthesis

Which type of endoplasmic reticulum is involved in the metabolism of lipids and glycogen?

Smooth Endoplasmic Reticulum

What is the diameter range of tubules in the tubular form of endoplasmic reticulum?

50 to 190 μm

In which cells is the smooth type of endoplasmic reticulum found abundantly?

Liver cells

What is the thickness of the membrane of the endoplasmic reticulum?

50 to 60 Å

Which component of the endoplasmic reticulum acts as a passage for the secretory products?

Cisternae

Test your knowledge on the introduction to the nucleus, a crucial structure in human cells that stores genetic information and controls cellular functions. Understand the role of DNA, mRNA, and protein synthesis.

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