Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 11786
TLS Online TPP Program

#Question id: 9594

The first reaction that converts electron energy into chemical energy—What will happened in  the primary photochemical event—

#Section 2: General Biology
  1. The transfer of an electron from the excited state of a chlorophyll in the reaction centre to an acceptor molecule-pheophytin
  2. The reaction centre chlorophyll is in an oxidized state (electron deficient, or positively charged), and the nearby electron acceptor molecule is reduced (electron rich, or negatively charged)
  3. The reaction centre chlorophyll is in an oxidized state (electron deficient, or negatively charged), and the nearby electron acceptor molecule is reduced (positively charged)
  4. The transfer of an electron from the excited state of a chlorophyll in the reaction centre to an acceptor molecule- plastocyanin
More Questions
TLS Online TPP Program

#Question id: 15137

#Section 6: Plant, Animal and Microbial Biotechnology

Most mitochondrial proteins however, are manufactured under the direction of the nucleus. Mitochondria reproduce by 
TLS Online TPP Program

#Question id: 15138

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Match the items in group 1 with an appropriate description in group 2.
Group 1                                                                Group 2
(P) SWISS PROT                                 (1) derived protein structure database 
(Q) Local alignment                          (2) protein sequence database
(R) CATH                                             (3) GAP
(S) Global alignment                        (4) Smith–Waterman algorithm
TLS Online TPP Program

#Question id: 15139

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Which one of the following is NOT a structure or structurally derived database?
TLS Online TPP Program

#Question id: 15140

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Two types of pair-wise sequence alignment of the same hypothetical protein sequence fragments are illustrated in the figure below. Vertical bars between the sequences indicate the presence of identical amino acids. * symbols in Figure Y indicate residues not included in the alignment.





Which one of the following is correct?
TLS Online TPP Program

#Question id: 15141

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

An alignment of two protein sequences is given below:

Sequence A         A G A A C D E V I G
Sequence B         A G E Y C D A V I G
The similarity score (%) for the above alignment will be:
TLS Online TPP Program

#Question id: 15142

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Dot matrix analysis of the amino acid sequences of lambda phage cI (horizontal sequence) and phage P22 c2 (vertical sequence) repressors is shown below. Which one of the following is correct?