#Question id: 10797
#I Life Science/ Life Sciences Group – I-V
The colored pigments of plants are of two principal types: carotenoids and flavonoids. Given below some statements of about these pigments;
a) Anthocyanins
are colored flavonoids that attract animals
b) Flavonoids are phenolic compounds that include a
wide range of colored substances
c) Carotenoids are coloured terpenoid compounds that
also serve as accessory pigments in photosynthesis
d) most widespread group of pigmented carotenoids is
the anthocyanins, these are glycosides that have sugars. Without their sugars,
anthocyanins are known as anthocyanidins
Which of the following is incorrect statements of these pigments;
#Question id: 19204
#SCPH06 I Botany
#Question id: 7764
#SCPH01 Biochemistry
Cellular senescence
may have evolved to protect organisms against cancer. Instead of dividing out
of control, the cells die. Cellular senescence appears to be regulated by
several tumor suppressor genes, especially p53.what is the most appropriate
reason behind this,
1) Transcription
factor p53 is thought to suppress tumorigenesis by causing cell arrest and
senescence in response to short telomeres, DNA damage, and viral or external
signals to divide
2) This factor can
stop the cell cycle, cause cellular senescence in rapidly dividing cells,
instruct genes to initiate cellular apoptosis, and activate DNA repair enzymes.
3) Induction of apoptosis or cellular senescence by p53 always beneficial.
#Question id: 2160
#SCPH28 | Zoology
An artificial membrane composed only of phospholipids has significant permeability to
#Question id: 2630
#SCPH28 | Zoology
What does graphical representation shown,