Multiple Choice Questions:
1. The cytoplasmic connections from cell to cell are known as
(A) middle lamella
(B) plasmodesmata
(C) cell membrane system
(D) endoplasmic reticulum
2. Due to presence of ________, endoplasmic reticulum is termed as rough endoplasmic reticulum.
(A) cistemae
(B) RNA
(C) ribosomes
(D) tubules
3. Golgi body is absent in
(A) Prokaryotes
(B) Mature mammalian RBC
(C) Akaryotes
(D) All of the above
4. Lysosomes are not helpful in
(A) Osteogenesis
(B) Cellular digestion
(C) Metamorphosis
(D) Lipogenesis
5. Identify the INCORRECT statements from the following.
1. Lysosomal enzymes do not digest their own membrane proteins.
2. Accidental release of lysosomal enzymes in limited amount does not harm the cell because pH of cytosol is near neutral.
3. Any insufficiency in secretion of lysosomal enzymes leads to disorders e.g. in genetic disorder- Klinefelter syndrome.
4. Due to insufficiency of protease brain gets impaired resulting from accumulation of fats.
(A) Statements i and ii are incorrect.
(B) Statements i, ii and iii are incorrect.
(C) Statements iii and iv are incorrect.
(D) Statements i, ii and iv are incorrect.
6. Tonoplast is a differentially permeable membrane surrounding the
(A) cytoplasm
(B) vacuole
(C) nucleus
(D) mitochondria
7. Which organelle is surrounded by two membranes?
(A) Ribosomes
(B) Peroxisomes
(C) Vacuoles
(D) Mitochondria
8. F particles are present in
(A) plasmids
(B) mitochondria
(C) chloroplast
(D) ribosomes
