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TLS Online TPP Program

#Question id: 1847

Which of the following statements is TRUE of DNA vaccines?

#Unit 4. Cell Communication and Cell Signaling

  1. DNA vaccines are relatively poor at stimulating cytotoxic T-lymphocyte responses in mice

  2. DNA vaccines must be administered on gold particles if they are to be effective

  3. DNA vaccines are only effective if followed by a protein boost

  4. DNA vaccines can have distinct advantages when preparing subunit vaccines against viruses that frequently alter their antigens

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TLS Online TPP Program

#Question id: 7274

#Unit 5. Developmental Biology

The following experiment is designed to study the role of several hormones in the regulation of metamorphosis in frogs.

Group #

Treatment

Days to Metamorphosis

1

Saline

30

2

Prolactin

> 100

3

TSH

15

4

Thyroxine

10

5

Corticosterone

30

6

Thyroxine + Corticosterone

5

7

Prolactin + TSH

30

8

Thyroid gland removed

> 100

 If the thyroid gland were removed from the tadpoles in Group 3, metamorphosis would
TLS Online TPP Program

#Question id: 10456

#Unit 6. System Physiology – Plant

Two identical subunits of UVR8 are linked in the dimer by a network of
TLS Online TPP Program

#Question id: 2052

#Unit 4. Cell Communication and Cell Signaling

Why have pigs have been proposed as a source of organs for xenotransplantation to humans?
TLS Online TPP Program

#Question id: 6952

#Unit 5. Developmental Biology

Which technique is commonly used for gene knock-out in mice?
TLS Online TPP Program

#Question id: 607

#Unit 1. Molecules and their Interaction Relevant to Biology

In E. coli ________ is an activator and ________ is a negative allosteric modulator of the enzyme phosphofructokinase-1.