Attempted
Correct
UnAttempted
Wrong
What is true about ribosomes?
Ribosomes are amembraneous (ie. without membrane)cell organelle composed of rRNA and protein. These are found in both prokaryotic and eukaryotic cells. In prokaryotes, ribosomes are 70S type while in eukaryotes,it is 80S type.
Which one of the following does not differ in E.coli and Chlamydomonas?
Cell membrane of E.coli, a bacteria and Chlamydomonas,a unicellular green alga does not differ. As in both cell membrane is composed of lipids and proteins
Ribosomal RNA is actively synthesized in
Ribosomal RNA is actively synthesized in nucleolus.Nucleolus is also known as ribosomal factory.
The telomeres of eukaryotic chromosomes consist of short sequences of
Eukaryotic telomeric DNA has been shown to consist of simple randomly repeated sequences characterized by clusters of G-residues in one strand and C-residues in the other. Another feature is a 3 overhang (12–16 nucleotides in length) of the G-rich stand.
Which one of the following is not considered as a part of the endomembrane system ?
Except peroxisome the remaining three and ER are the parts of endomembrane system.
In mitochondria, proteins accumulate in the
The inner membrane of mitochondria contains more than 151 different polypeptides, and has a very high protein-to- phospholipid ratio.
What are those structures that appear as beads – on-string in the chromosomes when viewed under electron microscope?
Under electron microscope the nucleosomes appear as beads on string in chromosome, due to a short length of DNA wrapped around a core of histone proteins.
Peptide synthesis inside a cell takes place in:
Peptide synthesis takes place in ribosome inside a cell.
Important site for formation of glycoproteins and glycolipidsis
Golgi apparatus is the important site for the formation of glycoprotein and glycolipid.
Sister chromatids are joined at