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 *