Select the incorrect statement: (a) Micro bodies contain...

Select the incorrect statement: (a) Micro bodies contain various enzyme and are present in both plant and animal cells. (b) Few chromosomes have non-staining secondary constriction of constant location. This give the appearance of a small fragment called the satellite. (c) Nuclei are spherical structures present in nucleoplasm and it is a site for ribosomal RNA synthesis. (d) Every chromosome essentially has a secondary constriction or the centromere on the sides of which disc shaped structures called kinetochores are present.

Select the incorrect statement:
(a) Micro bodies contain various enzyme and are present in both plant and animal cells.
(b) Few chromosomes have non-staining secondary constriction of constant location. This give the appearance of a small fragment called the satellite.
(c) Nuclei are spherical structures present in nucleoplasm and it is a site for ribosomal RNA synthesis.
(d) Every chromosome essentially has a secondary constriction or the centromere on the sides of which disc shaped structures called kinetochores are present.

Key Concepts

Centromere and Kinetochores

The centromere is a specialized region of the chromosome that serves as the attachment point for spindle fibers during cell division. Kinetochores, which are disc-shaped protein complexes, form at the centromere and play a key role in ensuring accurate chromosome alignment and separation during mitosis and meiosis.

Nucleolus

The nucleolus is a distinct, non-membrane bound structure within the nucleus. It is primarily responsible for the synthesis and assembly of ribosomal RNA (rRNA) and ribosome subunits, which are essential for protein synthesis in the cell.

Chromosome Structure

Chromosomes are complex structures that contain DNA and associated proteins. They feature different regions such as the primary constriction (centromere) which is critical for proper segregation during cell division, and sometimes a secondary constriction that may appear as a satellite, providing additional structural and functional differentiation.

Microbodies

These are small, enzyme-containing organelles found in both plant and animal cells that are involved in important metabolic functions such as the breakdown of fatty acids and detoxification. Their presence and diverse enzyme composition are essential for various cellular processes.

Transcript

00:01 So in the given question, we have been given certain statements and we need to determine the incorrect statement.

00:06 Now the first statement here is that microbodies, they contain various enzymes and they are present in both plant and animal cells.

00:25 Now, microbodies, well, microbodies, these are small, almost spherical organelles that are bounded by a single membrane.

00:34 Right now there are two main they are of two main types that is peroxosomes and glyoxysomes so these are they contain basically they contain enzymes peroxosomes occur in green cells and they contain oxidases especially glycolate oxidase which catalyze a reaction important in photorespiration so they are present micro bodies are present in both plant cells and animal right so this is a true statement now the second statement the second statement says that few chromosomes have non -staining secondary construction of at constant location and which gives it the appearance of a small fragment called satellite right so it's saying that satellite appearance it occurs due to presence of a secondary constriction construction or which is present at a constant location so what happens that there are certain chromosomes so consider this is a chromosome right now what happens in concern this is the first constriction which divides the center or the center may or which you know which you determine the length of the arms of the chromosomes whereas there is in some chromosome there is a secondary restriction a constriction due to which this secondary construction it provides this a shape of like a satellite so this the statement is also true second statement is true now third statement it says that nuclei are spherical structures present in nucleoplasm and it is the site for ribosomal rna synthesis...

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