Multiple Choice QuestionsA person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of
fats
ketones
amino acids
glucose
Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness?
Valium
Morphine
Hashish
Amphetamines
The main organelle involved in modification and routing of newly synthesized proteins to their destinations is
mitochondria
endoplasmic reticulum
lysosome
chloroplast
B.
endoplasmic reticulum
Endoplasmic Reticulum (ER) was coined by Porter. It is a network of tubules, vesicles and cisternae within an eukaryotic cell. Two types of ER are recognised on the basis of presence or absence of ribosomes on the wall of ER:
(i) Smooth ER- It helps in the synthesis of lipid and glycogen. Wall does not contain ribosomes.
(ii) Rough ER- It helps in protein synthesis and transfer. Wall contains ribosomes.
Protein synthesis takes place in ribosomes attached on wall of ER. Newly formed protein enters within the cavity of rough ER and follows following path:
Protein Cavity of rough ER Cavity of smooth ER Golgi membrane Lysosomes or transport vesicles or secretory granules.
Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because
four carbon acids are the primary initial CO2 fixation products
the primary fixation of CO2 is mediated via PEP carboxylase
effective pumping of CO2 into bundle sheath cells
RUBISCO in CO4 plants has higher affinity for CO2
At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell?
During entire prophase
During telophase
During S-phase
During G2 stage of prophase
There exists a close association between the alga and the fungus within a lichen. The fungus
fixes the atmospheric nitrogen for the alga
provides protection, anchorage and absorption for the alga
provides food for the alga
releases oxygen for the alga
Match items in Column- I with those in Column- II
| Column- I | Column- II |
| A. Peritrichous flagellation | 1. Ginkgo |
| B. Living fossil | 2. Macrocystes |
| C. Rhizophore | 3. Escherichia coli |
| D. Smallest flowering plant | 4. Selaginella |
| E. Largest perennial alga | 5.Wolffia |
Select the correct answer from the following
A B C D E
2 1 3 4 5
A B C D E
5 3 2 5 1
A B C D E
1 2 5 3 2
A B C D E
3 1 4 5 2
In which one pair both the plants can be vegetatively propagated by leaf pieces?
Bryophyllum and Kalanchoe
Chrysanthemum and Agave
Agave and Kalanchoe
Asparagus and Bryophyllum
Top-shaped multiciliate male gametes and the mature seed which bears only one embryo with two cotyledons, are characteristic features of
polypetalous angiosperms
gamopetalous angiosperms
conifers
cycads
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