Cell Structure and Function

 

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Q.1.  Chromatin occurs in two forms in chromosome euchromatin and heterochromatin, which one of them replicates first during cell cycle .

A) Heterochromatin

B) Euchromatin

C) Both replicates at same time.

D) Sometimes euchromatin sometimes heterochromatin. 

Q.2. Lysosomes are formed by budding off vesicles from Golgi apparatus and contain

A) Oxidizing enzymes

B) 40 different acid hydrolases

C) Respiratory enzymes

D) Basic hydrolases

Q.3. Hammer ling's experiment on Acetabularia proved the role of 

A) Chromosomes in heredity

B) Nucleus in heredity

C) Nucleo-cytoplasmic ratio

D) cytoplasm in controlling differentiation

Q.4. Besides cellulose micro fibrils, the other two cell wall network are

A) protein and hemicelluloes

B) hemicellulose and protein 

C) pectic and glycoprotein

D) pectin and hemicellulose

Q.5. Components of the eukaryotic plasma membrane are 

A) Protein and lipids

B) Protein and carbohydrates

C) Lipid (20-79%), protein (20-70%), oligosaccharides (1-5%) and water (20%) 

D) Lipids (20-70%), proteins (20-79%), carbohydrates (1-5%) and DNA

Q.6. Adjacent tracheid's and vessels can transfer sap through thin areas in their wall called

A) Plasmodesmata

B) Gap junctions

C) Tight junctions

D) Pits

Q.7. The main function of lysosome is

A) Sexual reproduction

B) Extracellular digestion

C) Intracellular digestion

D) Both (2) and (3) 

Q.8. Separated cell of two vertebrates are mixed up. They will

A) Aggregate species-wise

B) Aggregate tissue-wise

C) Aggregate species-wise and then tissue-wise

D) Aggregate species-wise and then reconstruct the animals.

Q.9. Amici (1818) Studied cyclosis for the first time in

A) Hydrilla

B) Amoeba 

C) Chara 

D) Acetabularia

Q.10. Prokaryotic ribosome are

A) 50S

B) 60S

C) 70S

D) 80S