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#Question id: 802

A single-stranded DNA molecule contains 40 nucleotides with equal amounts of A, C, G, and T. This DNA strand can combine with a complementary DNA strand to form a double-stranded DNA molecule. Which is a possible sequence and structure for this DNA molecule?

#SCPH05 I Biotechnology

  1. If the single-stranded molecule has the sequence 5’-(ATGC)10, then its double- stranded form could assume a Z-DNA structure.

  2. If the single-stranded molecule has the sequence 5’-(GATC)10, then its double-stranded form could assume an H-DNA structure.

  3. If the single-stranded molecule has the sequence 5’-(CTGA)10, then its double-stranded form could assume a hairpin structure.

  4. If the single-stranded molecule has the sequence 5’-(TGAC)10, then its double-stranded form could assume a cruciform structure.

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#Question id: 9260

#SCPH28 | Zoology

Suppose that the number of bird species is determined mainly by the number of vertical strata found in the environment. If so, in which of the following biomes would you find the greatest number of bird species?
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#Question id: 3852

#SCPH05 I Biotechnology

Which of the following is NOT one of the three stages of transcription?
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#Question id: 11266

#SCPH06 I Botany

Which of the following options lists ecosystems in increasing order of consumption efficiency of herbivore?
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#Question id: 7000

#SCPH28 | Zoology

One primary factor in shaping the polarity of the body axes in chick embryos is ________.
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#Question id: 6963

#I Life Science/ Life Sciences Group – I-V

During early sea urchin development, which embryonic cells have similar organizer activity to that of amphibian Spemann organizer?