Which of the following are true for an element?

(i) Atomic number = number of protons + number of electrons

(ii) Mass number = number of protons + number of neutrons

(iii) Atomic number = number of protons = number of neutrons

(iv) Atomic number = number of protons = number of electrons

(a) (i) and (ii)

(b) (i) and (iii)

(c) (ii) and (iii)

(d) (ii) and (iv)

TLS Online TPP Program

#Id: 8163

#Section 3: Genetics, Cellular and Molecular Biology

Vesicles coated with AP1 and clathrin bind to  proteins containing a Tyr-X-X-Φ sequence

TLS Online TPP Program

#Id: 8162

#Section 3: Genetics, Cellular and Molecular Biology

For selective export of certain membrane proteins from the ER contain a di-acidic sorting signal (Asp-X-Glu, or DXE), which binds to the Sec24 subunit of the COPII

TLS Online TPP Program

#Id: 8161

#Section 3: Genetics, Cellular and Molecular Biology

KKXX sorting signal,

binds to a complex of the COPI α and β subunits

TLS Online TPP Program

#Id: 8160

#Section 3: Genetics, Cellular and Molecular Biology

The KDEL receptor and other membrane proteins that

are transported Golgi to ER contain 

Lys-Lys-X-X sequence at C-terminal

TLS Online TPP Program

#Id: 8159

#Section 3: Genetics, Cellular and Molecular Biology

KDEL receptor, located mainly in the cis-Golgi network and in both COPII and COPI vesicles, binds proteins bearing the KDEL sorting signal and returns them to the ER

TLS Online TPP Program

#Id: 8158

#Section 3: Genetics, Cellular and Molecular Biology

Soluble ER-resident proteins contain C-terminal KDEL sorting signal that allows them to be retrieved.