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TLS Online TPP Program

#Question id: 39

What functional groups are present in this molecule?

#SCPH05 I Biotechnology

  1. Ether and aldehyde

  2. Hydroxyl and aldehyde

  3. Hydroxyl and Ketone

  4. Hydroxyl and carboxylic acid

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TLS Online TPP Program

#Question id: 9160

#SCPH28 | Zoology

Generally speaking, deserts are located in places where air masses are usually ________.
TLS Online TPP Program

#Question id: 16128

#SCPH01 Biochemistry

You are studying regulation of the yeast enzyme glutamine synthetase (GS), which is encoded by the GLN1 gene. You have isolated two mutants, designated gln2– and gln3–, that give decreased GS activity. Mating of either gln2– or gln3– haploids to wild type produces heterozygous diploids that show normal amounts of GS expression. When you cross either a gln2– or gln3– haploid to a gln1– strain the resulting diploids show normal expression of GS. 
Next, you decide to evaluate the promoter for the GLN1 gene. To do this you first fuse the promoter region to the LacZ coding sequence and then place this hybrid gene on an appropriate yeast plasmid. You find that cells carrying the hybrid gene express activity under the same conditions that GS is expressed in wild type cells, meaning that the promoter region you have selected contains all of the necessary cis-acting sequences for normal regulation. The figure below shows the effect of different 50 bp deletions in the promoter region on the amount of ß-galactosidase activity expressed by the reporter gene. how would you expect a gln2– gln3– double mutant to behave?
TLS Online TPP Program

#Question id: 10953

#SCPH28 | Zoology

What condition leads to a deficiency in factor IX that can be corrected by an intravenous injection of vitamin K?
TLS Online TPP Program

#Question id: 11460

#SCPH28 | Zoology

The round window ________.

I) dampens fluid vibrations

II) collects sound pressure waves

III) detects the frequency of sounds
TLS Online TPP Program

#Question id: 10798

#I Life Science/ Life Sciences Group – I-V

Two other major groups of flavonoids found in flowers and leaves of all green plants. The function of these two flavonoids in plants are____

a) protect plants against being eaten by herbivores and against being infected by microbial pathogens

b) Protect cells from excessive UV-B radiation (280–320 nm) because they accumulate in the epidermal layers of leaves and stems and absorb light strongly in the UV-B region       

c) flavones and flavonols secreted into the soil by legume roots mediate the interaction of legumes and nitrogen-fixing symbionts

d) They are are coloured terpenoid compounds that also serve as accessory pigments in photosynthesis    

Which of the following combination from the above statements is correct?