To meet a zygote's metabolic and developmental requirements,
A) maternal RNA and maternal proteins must be present.
B) paternal RNA and maternal proteins must be present.
C) the haploid DNA in the nucleus must be transcribed.
D) the nucleus must have hundreds of copies of every gene, allowing a high rate of gene expression.
E) the zygote must continuously undergo endocytosis of proteins to take them from its environment.

Question

Quizplus · Accepted Answer

Maternal RNA and proteins present in the egg cytoplasm are necessary to support the metabolic and developmental requirements of the zygote, as the zygote relies on these maternal factors until its own genes become activated. Paternal RNA may be present in the sperm, but it is generally degraded after fertilization and does not contribute significantly to early development. The haploid DNA in the nucleus must be replicated and transcribed, but it does not need to have multiple copies of every gene. Endocytosis of proteins from the environment is not a major source of nutrient uptake for the zygote.

To Meet a Zygote's Metabolic and Developmental Requirements