Given below are two statements: Statement I: The release of sperms into the seminiferous tubules is called spermiation.
Statement II: Spermiogenesis is the process of formation of sperms from spermatogonia.
In the light of the above statements, choose the
most appropriate answer from the options given
below:
In an E.coli strain i gene gets mutated and its
product can not bind the inducer molecule. If
growth medium is provided with lactose, what will
be the outcome?
Given below are two statements: Statement I: Autoimmune disorder is a condition where body defense mechanism recognizes its own cells as foreign bodies. Statement II: Rheumatoid arthritis is a condition where body does not attack self cells.
In the light of the above statements, choose the
most appropriate answer from the options given
below:
Which of the following statements with respect to
Endoplasmic Reticulum is incorrect?
Explanation:
The incorrect statement is option 2. In NCERT, Endoplasmic Reticulum (ER) is present in eukaryotic cells. Prokaryotes do not have ER at all; they lack membrane-bound organelles like ER. The RER has ribosomes on its outer surface and is involved in protein synthesis for secretion and membranes, while the SER lacks ribosomes and is the site for lipid synthesis and detoxification. Thus, options 1, 3, and 4 are true, and option 2 is false.
🧠 Did You Know?
RER with attached ribosomes synthesizes secretory and membrane proteins; SER handles lipid metabolism and detoxification processes.
💡 NCERT Memory Line:
ER is a network of sacs and tubules, consisting of RER (with ribosomes) and SER (without ribosomes).
