491. Nucleosome model proposed by
A
Du- Praw
B
Kornberg and Thomas
C
Sleffensen
D
Waldeyer and Taylor
Answer :
Kornberg and Thomas
492. Anthocyanin pigment occus in
A
Chromplasts
B
Amyloplasts
C
Cytoplasm
D
Cell sap
Answer :
Cell sap
493. Pericarp and petals contain
A
Chlorolpast
B
Chromoplast
C
Leucoplast
D
Etioplast
Answer :
Chromoplast
494. Amphipathic molecule in plasma membrane is
A
Protein
B
Carbohydrates
C
Phosphlipids
D
All of the above
Answer :
Phosphlipids
495.
The figure below shows the structure of a mitochondrion with its four parts labelled (A), (B), (C) and (D).
Select the part correctly matched with its function.
A
Part (D): Outer membrane-gives rise to inner membrane by splitting
B
Part (B): Inner membrane-forms infoldings called cristae
C
Part (C): Cristae-possess single circular DNA molecule and ribosomes
D
Part (A): Matrix-major site for respiratory chain enzymes
Answer :
Part (B): Inner membrane-forms infoldings called cristae
496. Cell organelle rich in hydrolases enzyme is
A
Mitochondria
B
Peroxisomes
C
Glyoxysomes
D
Lysosomes
Answer :
Lysosomes
497. Which of the following statements Regardingceliis not correct
A
Cilia contin an outer of nina doublet microtubules. surrounding two single microtubules.
B
The organized beation of cilia is controlled by fluxes of Ca2+ across the membrane.
C
Cilia are hair-like cellular appendages.
D
Microtubules of cilia are composed of tubulin.
Answer :
The organized beation of cilia is controlled by fluxes of Ca2+ across the membrane.
498. Histone which links the nucleosomes together is called
A
H1
B
H2 A
C
H 2 B
D
H4
Answer :
H1
499. By loss of rbosomes RER converts in
A
SER
B
Golgibody
C
Lysosome
D
Microtubules
Answer :
SER
500. The genes concerned with the production of cancer are called
A
Cancer genes
B
Carcino genes
C
Carcinomas
D
Onco genes
Answer :
Onco genes