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#Question id: 6943
#I Life Science/ Life Sciences Group – I-V
The portion of the blastoderm-stage embryo which will give rise to most ectodermal, mesodermal, and endodermal tissues is called the:
TLS Online TPP Program
#Question id: 17918
#SCPH01 Biochemistry
Match the items in Group 1 with an appropriate description in Group 2
Group 1 Group 2
P. PSI-BLAST 1. Protein sequence database
Q. CLUSTALW 2. Profiles
R. SWISS-PROT 3. Needleman-wunsh algorithm
S. Global alignment 4. Multiple sequence alignment
TLS Online TPP Program
#Question id: 2603
#SCPH28 | Zoology
If no ribosome begins translation of the leader peptide AUG, the hairpin forms by pairing of sequences 1 and 2, preventing formation of the 2 –3 hairpin, and allowing formation of the hairpin at sequences 3 –4, the condition is
TLS Online TPP Program
#Question id: 15637
#SCPH28 | Zoology
You have isolated two mutations in the Lac operon that cause constitutive expression of Lac genes. You designate these mutants Lac1– and Lac2–. Making use of an F' that carries the Lac operon with the LacY gene mutated, you construct strains that you test for both ß-galactosidase activity and Lac permease activity with results shown below.
Classify each mutation as dominant or recessive and as cis- or trans-acting, giving the experimental result that allows you to arrive at each conclusion. Finally, deduce what type of Lac mutation best fits the properties of Lac 1– and of Lac 2–.
TLS Online TPP Program
#Question id: 5552
#I Life Science/ Life Sciences Group – I-V
Soon after gastrulation, dorsal ectodermal cells condense and form a tube called the _______________ tube.