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TLS Online TPP Program

#Question id: 2145

An electrogenic Na+ transporter:

#XL - Q Biochemistry

  1. catalyzes facilitated diffusion of Na+ from a region of high Na+ concentration to one of lower Na+  concentration.

  2. must catalyze an electron transfer (oxidation-reduction) reaction simultaneously with Na+ transport.

  3. must transport both Na+ and a counterion (Cl–, for example).

  4. transports Na+ without concurrent transport of any other charged species.

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TLS Online TPP Program

#Question id: 17220

#XL - T Zoology

Which of the following occurs when certain adaptive hormones are released and cause changes in the structure and chemical composition of the body?
TLS Online TPP Program

#Question id: 12911

#XL - S Microbiology

Match the following:
A. DNA polymerases              i. Alkaline phosphatase        a.RNA-dependent DNA polymerase, used in cDNA synthesis
B. Reverse transcriptase        ii. T4 DNA ligase                    b. Thermostable DNA polymerase used in PCR
C. Ligases                                 iii.  AMV-RT                            c. Removes 5′-phosphates from DNA and RNA
D. Phosphatases                     iv. Taq DNA pol                      d. Links 5′-phosphate and 3′-hydroxyl ends via phosphodiester bond
TLS Online TPP Program

#Question id: 10579

#XL - T Zoology

The following graph is growing population, which of the following represent growth pattern?
TLS Online TPP Program

#Question id: 2191

#XL - S Microbiology

A membrane-affiliated protein is isolated by detergent extraction, and found to be amphipathic and lacking any nonprotein components. To which class of membrane proteins does it belong?
TLS Online TPP Program

#Question id: 2087

#XL - S Microbiology

Phospholipids with short or unsaturated fatty acyl chains