The answer is A. the presence or absence of an envelope
When the parents have recessive genetic disorder with the genotype gg, there are 100% chances that their second child will develop the disorder.
Genotype is the genetic makeup of an individual. It tells about the set of alleles a person exhibits for a particular trait. Recessive genetic disorder is an autosomal kind of disorder in which both the alleles inherited from the parents should be recessive. Sickle cell disease is an example of recessive genetic disorder.
When both parents are recessive for a trait, only one type of gamete is formed that can give rise to offspring with only the homozygous recessive trait.
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It is a complex cycle of mostly phosphorylation (adding or removing phosphate) and oxidative (electron removal) chemical reactions whereby 6 molecules of CO2 are converted into one molecule of glucose. It requires the energy-releasing cleavage of high energy bonds of 18 ATPs and 12NADPHs .
The correct answer is: D.carrying messages to other cells
• Allowing polar molecules to enter the cell - Membrane proteins can be involved in transport. This kind of proteins are called channel proteins and usually are integral, transmembrane proteins of the membrane (span across the bilayer). Channel proteins are responsible for facilitated diffusion and active transport of the molecules.
• Recognizing other types of cells- Membrane proteins may function as markers for cellular identification (recognition) and may connect and join two cells together
• Receiving messages – Membrane proteins are often receptors for peptide hormones and thus involved in signal transduction.
