The 5' methyl guanosine caps added during RNA chain elongation performs what function?

1. prevents degradation by nucleases 

2. are recognized by protein factors

3. are used to identify the type of RNA

#Question id: 1299

#SCPH05 I Biotechnology

Pectins and hyaluronic acid are both:

#Question id: 7309

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

Following statements are regarding to the molecular basis of the coincidence model in Arabidopsis.

A. In Arabidopsis under short days, there is little overlap between CO mRNA expression and daylight.

B. CO protein does not accumulate to sufficient levels in the phloem to promote the expression of the transmissible floral stimulus and the plant remains vegetative.

C. Under long days, the peak of CO mRNA abundance (at hours 12 through 16) overlaps with daylight (sensed by phyA and cryptochrome [cry]), allowing CO protein to accumulate.

D. CO activates FLC mRNA expression in the phloem, which causes flowering when the FT protein is translocated to the apical meristem.

Which of the following is incorrect?

#Question id: 2265

#SCPH01 Biochemistry

Passage through pores in the nuclear envelope is restricted primarily to

#Question id: 8855

#SCPH28 | Zoology

A spongeʹs structural materials (spicules, spongin) are manufactured by the

#Question id: 1563

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

A nonfunctional CD4 protein on a helper T cell would result in the helper T cell being unable to ________.