Which of the following has proved helpful in preserving pollen as fossils?
Pollenkitt
Cellulosic intine
Sporopollenin
Oil content
C.
Sporopollenin
Sporopollenin cannot be degraded by the enzyme; strong acids and alkali, therefore it is helpful in preserving pollen as fossil.
Pollenkitt – Help in insect pollination.
Cellulosic Intine – Inner sporoderm layer of pollen grain known as intine made up cellulose & pectin.
Oil content – No role is pollen preservation.
In India, the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is
Indian Council of Medical Research (ICMR)
Council for Scientific and Industrial Research (CSIR)
Genetic Engineering Appraisal Committee (GEAC)
Research Committee on Genetic Manipulation (RCGM)
The experimental proof for semiconservative replication of DNA was first shown in a
Fungus
Bacterium
Virus
Plant
Select the correct match
Alec Jeffreys - Streptococcus pneumoniae
Alfred Hershey and Martha Chase - TMV
Francois Jacob and Jacques Monod - Lac operon
Matthew Meselson and F. Stah - Pisum sativum
Select the correct statement
Franklin Stahl coined the term ‘‘linkage’’
Punnett square was developed by a British scientist
Transduction was discovered by S. Altman
Spliceosomes take part in translation
Which of the following pairs is wrongly matched?
Starch synthesis in pea: Multiple alleles
ABO blood grouping: Co-dominance
T.H. Morgan: Linkage
XO type sex determination: Grasshopper
The correct order of steps in Polymerase Chain Reaction (PCR) is
Extension, Denaturation, Annealing
Annealing, Extension, Denaturation
Denaturation, Annealing, Extension
Denaturation, Extension, Annealing
A ‘new’ variety of rice was patented by a foreign company, though such varieties have been present in India for a long time. This is related to
Co-667
Sharbati Sonora
Basmati
Lerma Rojo
Select the correct match
Ribozyme - Nucleic acid
F2 × Recessive parent - Dihybrid cross
G. Mendel - Transformation
T.H. Morgan - Transduction
