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TLS Online TPP Program

#Question id: 9052

Which of the following causes seasons on Earth?

#Unit 9. Diversity of Life Forms
  1. the variation in proximity of the Earth to the sun at different times of the year
  2. the constant tilt of the Earth, combined with its orbit around the sun
  3. the distance between the Earth and the sun in winter versus in the summer
  4. the variation or wobble of Earth's tilt during the year
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TLS Online TPP Program

#Question id: 157

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statement describes the primary structure of a protein
TLS Online TPP Program

#Question id: 18996

#Unit 13. Methods in Biology

If a sample is volatile between 200 – 300 C, which chromatography is used
TLS Online TPP Program

#Question id: 2554

#Unit 2. Cellular Organization

In chemiosmosis, what is the most direct source of energy that is used to convert ADP + i to ATP?
TLS Online TPP Program

#Question id: 7053

#Unit 5. Developmental Biology

The ability of an embryo or larva to react to an environmental input with a change in form, state, movement, or rate of activity (i.e., phenotypic change)
TLS Online TPP Program

#Question id: 7217

#Unit 5. Developmental Biology

Following statements regarding to the metamorphic changes of frog development.

A. The metamorphic changes are brought about by the secretion of the hormone thyroxine (T4) into the blood by the thyroid gland

B. the conversion of T4 into the more active hormone tri-iodothyronine (T3) by the target tissues

C. the degradation of T3 in the target tissues

D. by the deiodinases enzymes T3 converted into T4 in target tissues.

Which of the following options are correct?