1321. Only the plant cells contain :

A. Plasma membrane
B. Chloroplasts *
C. Mitochondria
D. Nucleolus

1322. The accumulation of CO2 in large quantities in the atmosphere causes the problem of :

A. Air pollution
B. Over cooling of atmosphere
C. Degradation of Biodiversity
D. Green house effect *

1323. The ovary in plants matures into :

A. Fruit
B. Seed *
C. Endosperm
D. Embryo

1324. The first step in photosynthesis is :

A. Excitation chrlorophyll electron
B. Photolysis of water *
C. Formation of NADPH2
D. Formation of ATP

1325. which one of the following is Non-renewable resource ?

A. Wildlife *
B. Biodivrsity
C. Fossil Fuel
D. Forest

1326. A plant disease caused by bacteria is called :

A. Loose smut
B. Crown Gall *
C. Leaf rust
D. Powdery

1327. Mildew Enzymes are chemically :

A. Carbohydrates
B. Lipids
C. Proteins *
D. None of these

1328. Genes determine :

A. The sex of a baby *
B. A phenotypic character
C. Synthesis of a polypeptide
D. All of these

1329. “It is the outermost layer of the animal cell, it is thin, delicate, elastic and capable of self repair ” The statement is true for :

A. Cell wall
B. Cell membrane
C. Middle lamella
D. Nuclear Membrane *

1330. Biotechnology refers to :

A. Manipulation of genes
B. Cheese making
C. Manipulation of Biological systems
D. All of these *