1
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
Thermococcus, Methanococcus and Methanobacterium exemplify
A
backteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
B
bacteria that contain a cytoskeleton and ribosomes
C
archaebacteria that contain protein homologous to eukaryotic core histones
D
archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled.
2
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements in true about archaea?
A
Archaea completely differ from both prokaryyotes and eukaryotes.
B
Archaea completely differ from prokaryotes.
C
Archaea resemble eukarya in all respects.
D
Archaea have some novel features that are absent in other prokaryotes and eukaryotes.
3
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms.
A
Perianth and two integuments
B
Embryo development and apical meristem
C
Absence of resin duct and leaf venation
D
Presence of vessel elements and absence of archegonia
4
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
In which one of the following male and female gametophytes do not have free living independent existance?
A
Polytrichum
B
Cedrus
C
Pteris
D
Funaria
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