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TLS Online TPP Program

#Question id: 146

The pH inside cells is normally near pH 7. At pH 7 which statement is true about the charges (ionization state) of the α-Carboxyl and α-Amino groups of an amino acid?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. The α-Carboxyl group is 1- and the α-Amino group is 1+.

  2. The α-Carboxyl group is 1+ and the α-Amino group is 1-.

  3. The α-Carboxyl group is 1- and the α-Amino group is uncharged.

  4. Both groups are uncharged (not ionized) at pH 7.

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TLS Online TPP Program

#Question id: 2298

#Unit 2. Cellular Organization

The endoplasmic reticulum and ribosomes are both involved in   
TLS Online TPP Program

#Question id: 2299

#Unit 2. Cellular Organization

_______ are plastids containing carotenoid pigments, and _______ are plastids containing starches.
TLS Online TPP Program

#Question id: 2300

#Unit 2. Cellular Organization

Which of the following is not found in cell sap?
TLS Online TPP Program

#Question id: 2301

#Unit 2. Cellular Organization

Microtubules are involved in the.
TLS Online TPP Program

#Question id: 2302

#Unit 2. Cellular Organization

In which interval of interphase is DNA duplicated?
TLS Online TPP Program

#Question id: 2303

#Unit 2. Cellular Organization

During cell division spindle fibers attach themselves to the _______ located on the chromosomes.