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TLS Online TPP Program

#Question id: 9599

The primary donor of PSI, P700, is a dimer of chlorophyll a molecules, in primary donor chlorophyll, additional chlorophylls molecules such as

#XL - Q Biochemistry
  1. Carotenoids, Pheophytins, and Plastoquinones are bound to the membrane proteins D1 and D2, Which are found in the core of the reaction center
  2. Carotenoids, Pheophytins, and Plastoquinones are bound to the membrane proteins D1 and D2, Which are present on the surface of the reaction center
  3. iron–sulfur proteins,  ferredoxin (Fd), flavoprotein ferredoxin–NADP+ reductase (FNR) are bound to the membrane proteins D1 and D2
  4. D1 and D2 proteins are found in the core of the reaction centre and are the part of photosystem I 
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TLS Online TPP Program

#Question id: 5757

#XL - S Microbiology

A new E. coli mutant was tested for auxotrophy. The mutant grows on:

minimal medium (M) + arginine (A) + proline (P)

M + P + histidine (H)

M + A + H + P

but not on M or on M + A + H. The mutant requires
TLS Online TPP Program

#Question id: 5758

#XL - S Microbiology

Consider a species with a diploid (2n) number of 28 chromosomes. How many chromosomes would be found in a monoploid body cell?
TLS Online TPP Program

#Question id: 5758

#XL - R Botany

Consider a species with a diploid (2n) number of 28 chromosomes. How many chromosomes would be found in a monoploid body cell?
TLS Online TPP Program

#Question id: 5760

#XL - S Microbiology

The fluctuation test of Luria and Delbruck (studying resistance to bacteriophge T1 infection) established that
TLS Online TPP Program

#Question id: 5760

#XL - R Botany

The fluctuation test of Luria and Delbruck (studying resistance to bacteriophge T1 infection) established that
TLS Online TPP Program

#Question id: 5761

#XL - S Microbiology

E. coli cells were spread on an agar plate, producing 1000 colonies.  The colonies are replica plated on two agar plates containing the antibiotic kanamycin and one agar plate without antibiotics.  All of the colonies are able to grow on the agar plate without antibiotic but only 4 colonies are able to grow on each of the agar plates containing kanamycin.  You notice that the four colonies that grew on each of the kanamycin containing plates are in the exact same position.  This demonstrates