Multiple Choice QuestionsWhich one of the following is correct for blooming of 'short day' plants?
The long dark period is not critical
It is affected by interruption of long dark period by brief exposure of light
It is not affected by interruption of long dark period by brief exposure of light
It is affected if the continuous light period is interrupted
A dicotyledonous plant forms crown gall when
Agrobacterium tumefaciens comes in contact with the plant
Agrobacterium rhizogenes comes in contact with the plant
a specific part of DNA from the Ti-plasmid gets integrated with the plant chromosome
a specific part of DNA from the Ri-plasmid gets integrated with the plant chromosome
Which one of the followings is correct for the trans membrane proteins in lipid bilayer?
They are absent in animal cells
They act as channel proteins
They are absent in plant cells
They are only externally located
Engulfing ofsolid materials by cells is called
pinocytosis
phagocytosis
active transport
autolysis
B.
phagocytosis
The process of engulfing of solid material by infolding of plasma membrane is called phagocytosis.
The process of engulfing of liquid material by infoldings of plasma membrane is called pinocytosis.
Active transport is the movement of moecules across a cell membrane in the direction against their concentration gradient, i.e. moving from an area of lower concentration to an area of higher concentration.
Autolysis or self- digestion refers to the destruction of a cell through the action of its own enzymes.
Two membrane envelops is found in
mitochondria, Golgi apparatus and chloroplast
mitochondria, nucleus and chloroplast
nucleus, Golgi apparatus and endoplasmic reticulum
nucleus, ribosome and chloroplast
Match the item in column I with those in column II and the choose the correct answer.
| Column I | Column II |
| A. Mitosis | 1. Occurs in diploid cells only |
| B. Meiosis | 2. Occurs in both haploid and diploid cells |
| 3. Daughter and parent cells have same chromosome numbers | |
| 4. Synapsis of homologous chromosomes. |
A- 1; B- 2
A- 2; B- 3
A- 3; B- 4
A- 4; B- 1
Select correct combination of statements for lymph.
I. It helps to maintain fluid balance of the body.
II. It is contained in lymphatic vessels and lymphatic organs in mammals.
III. It is derived from tissue fluid.
IV. It contains less antibodies than plasma.
V. Flows in both directions.
VI. It helps to conserve proteins and remove bacteria.
I, II, III, V
II, III, IV, VI
I, IV, V, VI
III, IV, V, VI
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