A true column of chromosomes number in garden – pea, onion, and tobacco is:
Garden pea Onion Tobacco
A. 13 15 47
B. 14 16 48
C. 15 17 49
D. 16 18 50
Breaking down of hydrogen peroxide into oxygen and water is carried by
A. Peroxisomes
B. Glyoxisomes
C. Lysosomes
D. Mitochondria
Proper arrangement of layers in plant cell wall from inside to outward is
A. Primary wall – secondary wall – middle lamella
B. Secondary wall – primary wall – middle lamella
C. Primary wall – middle lamella – secondary wall
D. Secondary wall – middle lamella – primary wall
The attachment of two sub units of Ribosomes along mRNA is controlled by
A. Sodium ions
B. Calcium ions
C. Potassium ions
D. Magnesium ions
A cell fails to detoxify the waste substances produced in it because it does not possess enough…..
A. Lysosomes
B. Ribosomes
C. Rough E.R
D. Smooth E.R
Which one of the following is found in plant cell only….?
A. Peroxisomes
B. Lysosomes
C. Glyoxisomes
D. Ribosomes
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