Consider the following statements:
I. Higher the taxa, more are the characteristics that members whithin the taxon share.
II. Lower the category, greater is the difficulty of determining the relationship to other taxa at the same level.
Of the two statements:
(1) I is true but II is false
(2) I is false but II is true
(3) Both I and II are true
(4) Both I and II are false
Consider the following statements regarding characters of Archaebacteria that they share with eukaryotes:
I. The cell wall does not contain peptidoglycan.
II. DNA associated with histones.
III. Translation initiated with formylated methionine.
IV. RNA polymerase similar to eukaryotic RNA polymerase II
V. ATPase similarity
VI. Similar DNA replication and repair
How many of the above characters Archaebacteria share with eukaryotes?
The living organisms can be unexceptionally distinguished from the non-living things on the basis of their ability for:
(1) responsiveness to touch
(2) interaction with the environment and progressive evolution
(4) growth and movement
Which one of the following does not differ in E.coli and Chlamydomonas?
(2) Chromosomal organization
(3) Cell wall
(4) Cell membrane
In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statement is true about archaea?
(1) Archaea resemble eukarya in all respects
(2) Archaea have some novel features that are absent in other prokaryotes and eukaryotes
(3) Archaea completely differ from both prokaryotes and eukaryotes
(4) Archaea completely differ from prokaryotes
In prokaryotes, genetic recombination can occur during
(4) all of these
The growth curve of bacterial population in lab is plotted against time. What will be the shape of graph?
(3) Ascending straight line
(4) Descending straight line
A bacterium divides every 35 minutes. If a culture containing 105 cells/mL is grown for 175 minutes, what will be the cell concentration/mL after 175 minutes?
(1) 5 × 105 cells
(2) 35 × 105 cells
(3) 32 × 105 cells
(4) 4.175 × 105 cells
The metachromatic granules are
(1) present in plants cell at metaphase stage
(2) inclusion bodies in bacteria
(3) produced in insects during metamorphosis
(4) chromatophores in animals skin
Find out the wrong statement -
a. Increase in mass and increase in number of individuals are twin characteristics of growth.
b. Growth, reproduction and ability to respond are the only unique features of living organisms.
c. a and b both
d. Metabolism, ability to self-replicate and self-organise are the unique features of living organisms.
According to all limitations, finally which is the defining feature of life forms?
b. Cellular organisation
Which of the following is wrong with respect to taxonomy?
a. Process of classification
b. External and internal structure, structure of cell development process and ecological information is the basis of modern taxonomic studies.
c. Characterisation, identification are the only basic processes to taxonomy.
d. Taxonomy is not something new.
Taxonomic groups or categories are not
a. Distinct Biological entities
b. Morphological aggregates
c. Part of overall taxonomic arrangement
d. Rank denoting entities
Order and higher taxon are identified on the basis of-
a. Similarities in characters
b. Dissimilarities in characters
c. Aggregates of characters
d. Both a and c
Higher the category……. is the …...of determining the relationship to other taxa at the same level.
a. Lesser, difficulty
b. Greater, difficulty
c. More, ease
d. Lesser, ways
The prime source of taxonomic studies is
a. Classification of correct specimen
b. Identification of specimen
c. Collection of actual specimen
d. Knowing the biodiversity value of specimen
Which of the following does not hold true for couplet?
a. Basis of Keys
b. Contrasting characters
c. Has use in Museum
d. Choice is made between two opposite characters.
Coenocytic hyphae are-
a. Continuous tubes filled with uninucleated cytoplasm
b. Continuous tubes filled with multinucleated cytoplasm
c. Branched tubes filled with multinucleated cytoplasm
d. Branched tubes filled with uninucleated cytoplasm
If meiosis in zygote results in haploid spores, then ploidy of adult cells should be-
d. None of the above