Multiple Choice QuestionsIndependent assortment of gene occurs due to the orientation of chromosomes at
Metaphase-I of mitosis
Metaphase-I of meiosis
Metaphase-II of meiosis
Any phase of the cell division
The non-disjunction, in meiosis may result is extra copy of a chromosome in a sperm cell. During which phase the above phenomenon may occur?
Prophase-I, prophase-II
Prophase-I, prophase-II
Anaphase-I, anaphase-II
Anaphase-I, telophase-II
Thermococcus, Methanococcus and Methanobacterium are groups of
Bacteria containing a cytoskeleton and all membrane-bound organelles
Archaebacteria with peptidoglycan in their cell wall
Archaebacteria that consists of protein homologous to eukaryotic core histones
Most advanced type of bacteria
Which of the following sequences represent a possible pathway in the production of a secretory protein?
Rough ER → Secretory vesicle → Ribosome → Golgi apparatus
Ribosome → Rough ER → Golgi apparatus → Secretory vesicle
Secretory vesicle → Golgi apparatus → Ribosomes → Rough ER
Rough ER → Ribosomes → Secretory vesicles → Golgi appratus
A connecting link between plant and animal kingdom is
Paramecium
Chlamydomonas
Chlorella
Euglena
If the free energy change of a reaction is greater than zero, then the reaction is
Spontaneous
Non-spontaneous
At equilibrium
Endothermic
Organisms who are able to freely interbreed producing fertile off-springs and having a similar blueprint for making these organisms are referred to as
Species
Tribe
Genus
Sub-genus
A.
Species
The term species was given by John Ray and are the lowest category of classification. A species is a group of closely related individuals having similar morphological, anatomical, biochemical and cytological characteristics. It consists of naturally interbreeding population with the ability to produce fertile offsprings. This group is reproductively isolated and genetically closed.
The enzyme hexokinase which catalysis glucose to a glucose-6-phosphate in glycolysis is inhibited by glucose-6-phosphate. This is an example of
I. Competitive inhibition
II. non-competitive inhibition
III. feedback allosteric inhibition
Which of the above statements is/are correct?
I and II
I and III
Only III
All of these
The mitotic cell cycle is divided typically into four phases; G1, S, G2 and M. Considering a mitotic cycle time of 18 hrs; the distribution of period of time (in hrs) for each of these phases will be
| G1 | S | G2 | M |
| 1 | 3 | 5 | 9 |
| G1 | S | G2 | M |
| 9 | 1 | 3 | 5 |
| G1 | S | G2 | M |
| 9 | 5 | 3 | 1 |
| G1 | S | G2 | M |
| 3 | 5 | 9 | 1 |
Which of the following is the most primitive ancestor of man?
Ramapithecus
Homo habilis
Australopithecus
Homo sapiens neanderthalensis
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