Multiple Choice QuestionsRibosomal RNA is actively synthesised in
lysosomes
nucleolus
nucleoplasm
nucleoplasm
B.
nucleolus
In eukaryotes, the site of synthesis of most of the ribosomal RNA (rRNA) is nucleolus. The nucleolar organiser contains many copies of ribosomal DNA (repetitive DNA). The RNA cistron of nucleolar DNA forms 45 S precursor with the help of RNA polymerase. This 45 S RNA undergoes to give 18S, 28S and 5.8 S rRNA units. Out of different rRNAs, the 5S rRNA is not synthesized in nucleolus. It is synthesized outside it.
Identify the possible link A in the following food chain
Green plant 
Insect 
Frog 
A 
Eagle
rabbit
wolf
cobra
cobra
Given below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels?
Level PC is insects and level SC is small insectivorous birds
Level PP is phytoplanktons in sea and Whale on top level TC
Level on PP is pipal trees and the level SC is sheep
Level on PP is pipal trees and the level SC is sheep
Monascus purpureus is a yeast used commercially in the production of
ethanol
streptokinase for removing clots from the blood vessels
citric acid
citric acid
A normal-visioned man whose father was colour-blind, marries a woman whose father was also colour-blind. They have their first child as a daughter. What are the chances that this child would be colour-blind?
100%
0%
25%
25%
Signals for parturition originate from
both placenta as well as fully developed foetus
oxytocin released from maternal pituitary
placenta only
placenta only
A patient brought to a hospital with myocardial infarction is normally immediately given
penicillin
streptokinase
cyclosporin - A
cyclosporin - A
Which one of the following is not a property of cancerous cells, whereas the remaining three are?
They compete with normal cells for vital nutrients.
They do not remain confined in the area of formation
They divide in an uncontrolled manner
They divide in an uncontrolled manner
Which one of the following is not a functional unit of an ecosystem?
Energy flow
Decomposition
Productivity
Productivity
In a normal pregnant woman, the amount of total gonadotropin activity was assessed. The result expected was
High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo
High level of circulating HCG to stimulate endometrial thickening
High levels of FSH and LH in uterus to stimulate endometrial thickening
High levels of FSH and LH in uterus to stimulate endometrial thickening
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