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TLS Online TPP Program

#Question id: 14766

Which of the following statements does not belongs to the regulatory mechanism of the Arp2/3 complex by WASp and PI(4,5)P2?

#Unit 2. Cellular Organization
  1. The NPF WASp is inactive due to an intramolecular interaction that masks the WCA domain. 
  2. NPF WASp is activated by a coincidence detection mechanism, it must bind both the regulatory phospholipid PI(4,5)P2 though its basic domain (B) and the membrane-bound active small G protein Cdc42-GTP through its Rho-binding domain. 
  3. When activated by the Cdc42-GTP, the intramolecular interaction in WASp is relieved, allowing the W domain to bind actin and the acidic A domain to activate the Arp2/3 complex.
  4. The Arp2/3 branch makes a characteristic 70° angle between the old and new filaments.
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TLS Online TPP Program

#Question id: 24187

#Unit 1. Molecules and their Interaction Relevant to Biology

The use of desktop computer equipment and software to create high quality documents such as newsletters, business cards, letterhead, and brochures is called Desktop Publishing, or DTP. The most important part of any DTP project is planning. Before you begin, you should know your intended audience, the message you want to communicate, and what form your message will take.

The paragraph best supports the statement that
TLS Online TPP Program

#Question id: 24186

#Unit 1. Molecules and their Interaction Relevant to Biology

In cities throughout the country, there is a new direction in local campaign coverage. Frequently in local elections, journalists are not giving voters enough information to understand the issues and evaluate the candidates. The local news media devotes too much time to scandal and not enough time to policy.

This paragraph best supports the statement that the local news media
TLS Online TPP Program

#Question id: 27575

#Unit 1. Molecules and their Interaction Relevant to Biology

Which kind of interactions occur between the side chains of oppositely charged residues as well as between the NH3+ and COO− groups at the ends of polypeptide
TLS Online TPP Program

#Question id: 27573

#Unit 1. Molecules and their Interaction Relevant to Biology

Interaction type, Distance dependence of potential energy, and Typical energy (kJ mol-1) are given

Interaction typeDistance dependence of potential energyTypical energy (kJ mol⁻¹)
1. Ion-iona. 1/r6i. 2
2. Ion-dipoleb. 1/r6ii. 15
3. Dipole-dipole (rotating polar molecule)c. 1/r2iii. 0.3
4. London (dispersion)d. 1/riv. 250

Match them correctly
TLS Online TPP Program

#Question id: 27569

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is the most prominent type of interaction found between two molecule of water
TLS Online TPP Program

#Question id: 27080

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the correct statement about Vander-wall interaction  
1. Van der Waals potential (Evdw) is the sum of all interactions over all atoms
2. Van der Waals potential (Evdw)  is calculated by
3. This type of interaction is often called a 6–12 interaction, or the Leonard Jones potential.
4. Van der Waals forces are extremely weak, especially when compared with other forces influencing protein conformation