True. Ribosomes stud the surface of rough endoplasmic reticulum.
True. The rough endoplasmic reticulum (RER) appears rough because it is covered with ribosomes, which are responsible for protein synthesis. The presence of ribosomes on the RER gives it a bumpy or rough appearance under a microscope.
No, it is false. While the ribosomes synthesize proteins, the endoplasmic reticulum modifies and folds them, and the Golgi apparatus then further processes and packages them, not all synthesized proteins are destined for secretion. Some proteins are used within the cell for various functions such as structural support, enzymatic reactions, or signaling pathways.
That is not entirely accurate. While the ribosomes synthesize proteins in the cell, the endoplasmic reticulum modifies and folds these proteins before transporting them to the Golgi apparatus. The Golgi apparatus further modifies and packages proteins for secretion, but it also plays a role in processing and sorting proteins for use within the cell.
False. Ribosomes are not permeable to the nuclear membrane. They are synthesized in the nucleolus of the nucleus and then transported out through nuclear pores to the cytoplasm where they function in protein synthesis.
It is not true.
False. Ribosomes do not carry out lipid synthesis. Lipid synthesis occurs in the endoplasmic reticulum and other organelles within the cell. Ribosomes are responsible for protein synthesis.
True. The rough endoplasmic reticulum (RER) appears rough because it is covered with ribosomes, which are responsible for protein synthesis. The presence of ribosomes on the RER gives it a bumpy or rough appearance under a microscope.
False. Ribosomes are not membrane-bound organelles. They are small, complex structures responsible for protein synthesis within the cell. They can be found free-floating in the cytoplasm or attached to the endoplasmic reticulum.
true
true
No, it is false. While the ribosomes synthesize proteins, the endoplasmic reticulum modifies and folds them, and the Golgi apparatus then further processes and packages them, not all synthesized proteins are destined for secretion. Some proteins are used within the cell for various functions such as structural support, enzymatic reactions, or signaling pathways.
That is not entirely accurate. While the ribosomes synthesize proteins in the cell, the endoplasmic reticulum modifies and folds these proteins before transporting them to the Golgi apparatus. The Golgi apparatus further modifies and packages proteins for secretion, but it also plays a role in processing and sorting proteins for use within the cell.
Ribosomal RNA is produced by the nucleolus, which is a substructure found within the nucleus of eukaryotic cells. The nucleolus is responsible for synthesizing and assembling the components of ribosomes, including ribosomal RNA.
False. The assembly of ribosomes begins in a small dense structure called the nucleolus, not the chromatin.
No, the Golgi complex does not directly make peroxisomes or lysosomes. Peroxisomes are derived from the endoplasmic reticulum, while lysosomes are formed from the Golgi complex. Both organelles play distinct roles in the cell's metabolism and degradation processes.
False. Ribosomes are not permeable to the nuclear membrane. They are synthesized in the nucleolus of the nucleus and then transported out through nuclear pores to the cytoplasm where they function in protein synthesis.
A shiny surface reflects 'more' light than a matt surface.