Choose the wrong statement

• Penicillium is multicellular and produces antibiotics

• Neurospora is used in the study of biochemical genetics

• Morels and truffles are poisonous mushrooms

• Morels and truffles are poisonous mushrooms

Archaebacteria differ from eubacteria in

• cell membrane structure

• mode of nutrition

• cell shape

• cell shape

Which of the following is responsible for peat formation?

• Marchantia

• Riccia

• Funaria

• Funaria

In which group of organisms the cell walls form two thin overlapping shells which fit together?

• Chrysophytes

• Euglenoids

• Dinoflagellates

• Dinoflagellates

Pick up the wrong statement

• Cell wall is absent in Animalia

• Protis ta have photosyn thetic and heterotrophic modes of nutrition

• Some fungi are edible

• Some fungi are edible

Dr F went noted that if coleoptile tips were removed and placed on agar for one hour, the agar would produce a bending when placed on one side of freshly cut coleoptile stumps. Of what significance is this experiment?

• It made possible the isolation and exact identification of auxin

• It is the basis for quantitative determination of small amounts of growth - promoting substances

• It supports the hypothesis that IAA is auxin

• It supports the hypothesis that IAA is auxin

Which of the following are most suitable indicators of SO₂ pollution in the environment?

• Lichens

• Conifers

• Algae

• Algae

The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are the ones categorised as

• Cyanobacteria

• Archaebactera

• Chemosynthetic autotrophs

• Chemosynthetic autotrophs

Viruses have

• DNA enclosed in a protein coat

• prokaryotic nucleus

• single chromosome

• single chromosome

20.

The first human hormone produced by recombinant 

• insulin

• estrogen

• thyroxin

• thyroxin