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TLS Online TPP Program

#Question id: 15607

In gene transformation over high expression can be achieved by expressing the gene 
1. Inducible promoter
2. Constitutive  promoter
3. Terminator sequence
4. Increasing copy no. of gene
Which of the following are correct

#Unit 12. Applied Biology
  1. 1&2 
  2. 2&4 
  3. 2&3 
  4. 1,2,3&4
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TLS Online TPP Program

#Question id: 22950

#Unit 5. Developmental Biology

APETALA1 belongs to the transcription factor family:
TLS Online TPP Program

#Question id: 11638

#Unit 9. Diversity of Life Forms

Which group includes members that are important primary producers in ocean food webs, causes red tides that kill many fish, and may even be carnivorous?
TLS Online TPP Program

#Question id: 7250

#Unit 5. Developmental Biology

Following statements are regarding to signals that regulate axis extension in chick embryos.

A. In the stage 10 chick embryo, Fgf8 inhibits expression of the retinoic acid (RA) synthesizing enzyme Raldh2 in the presomitic mesoderm and the expression of the RA receptor RARβ in the neural ectoderm, thus preventing RA from triggering differentiation in the caudal-lateral epiblast cells and the caudal-most paraxial mesoderm.

B. Fgf8 inhibits Sonic hedgehog (Shh) expression in the neural tube floorplate, controlling the onset of ventral patterning genes.

C. FGF signaling is also required for expression of Delta1 in the medial portion of the caudal-lateral epiblast cells and promotes expression of Wnt8c.

D. Fgf8 decays in the caudal paraxial mesoderm, Wnt signaling, most likely provided by Wnt8c, now acts to promote Raldh2 in the adjacent paraxial mesoderm. RA produced by Raldh2 activity expresses Fgf8 and Wnt8c.

Which of the following statements are correct?
TLS Online TPP Program

#Question id: 33472

#Unit 2. Cellular Organization

Find correct True and False statements
A. Human females have 23 different chromosomes, whereas human males have 24.
B. In the living cell, chromatin usually adopts the extended “beads-on-astring” form.
C. The four core histones are relatively small proteins with a very high proportion of positively charged amino acids; the positive charge helps the histones bind tightly to DNA, regardless of its nucleotide sequence.
D. Nucleosomes bind DNA so tightly that they cannot move from the positions where they are first assembled.
TLS Online TPP Program

#Question id: 379

#Unit 1. Molecules and their Interaction Relevant to Biology

A compound has a pKa of 7.4. To 100 mL of a 1.0 M solution of this compound at pH 8.0 is added 30 mL of 1.0 M hydrochloric acid. The resulting solution is pH: