11.

Which of the following is responsible for the mechanical support, protein synthesis and enzyme transport?

• Cell membrane

• Mitochondria

• Dictyosome

• Endoplasmic reticulum

Thickening of arteries due to cholesterol deposition is

• arteriosclerosis

• rheumatic heart

• blood pressure

• cardiac arrest

An example of competitive inhibition ofan enzyme is the inhibition of

• succinic dehydrogenase by malonic acid

• cytochrome oxidase by cyanide

• hexokinase by glucose-6-phosphate

• carbonic anhydrase by carbon dioxide

Which of the following is the connecting link between glycolysis and Krebs cycle?

• Acetyl Co- A

• Oxalosuccinic acid

• Pyruvic acid

• Citric acid

Which of the following contain $\mathrm{\beta }$-1, 4 linkage?

• Maltose

• Sucrose

• Lactose

• Fructose

Which statement is true?

• Adenine has 4 nitrogen atoms.

• Cytosine has 3 nitrogen atoms

• Guanosine has 3 nitrogen atoms

• Uracil has 5 nitrogen atoms

Which of the following helps in ascent of sap?

• Root pressure

• Transpiration

• Capillarity

• All of these

Which of the following is correct set of micronutrient for plants?

• Mg, Si, Fe, Cu, Ca

• Cu, Fe, Zn, B, Mn

• Mg, Fe, Zn, B, Mn

• Mo, Zn, Cl, Mg, Ca

Velamen present in orchids helps in

• absorption of nutrients from host plant

• respiration

• absorption of moisture from air

• synthesising food

Hydroponics is

• nutrient less culture

• water less culture

• soilless culture

• none of these