Independent 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
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 |
C.
G1 | S | G2 | M |
9 | 5 | 3 | 1 |
The longest phase of cell cycle in G1 where these rapid growths and metabolic activity, followed by S phase for DNA synthesis and replication then G2 phase for preparation of cell division and lastly mitotic phase.
therefore, Ratio is 9:5:3:1
Which of the following is the most primitive ancestor of man?
Ramapithecus
Homo habilis
Australopithecus
Homo sapiens neanderthalensis