Imagine a new type of cell was discovered on Mars in an organism growing in benzene, a nonpolar liquid. The cell had a lipid bil
ayer made of phospholipids, but its structure was very different from that of our cell membranes.What might be characteristic features of the phospholipid head groups?1) The phospholipid head groups would likely bind to each other with covalent bonds that would pack well and not be bulky.2) The phospholipid head groups would likely have equal numbers of positively and negatively charged groups that would pack well and not be bulky.3) The phospholipid head groups would likely have equal numbers of hydroxyl and amino groups that would pack well and not be bulky.4) The phospholipid head groups would likely bind to each other with hydrogen bonding that would pack well and not be bulky.
2) The phospholipid head groups would likely have equal numbers of positively and negatively charged groups that would pack well and not be bulky.
Explanation:
Benzene contains aromatic groups making it non-polar while the phopholipid head contains the negatively charged phosphate group making it polar. These molecules would repel each other forcing the phopholipid head to be in the inner membrane forming. The hydrophobic non-polar phospholipid tail would form hydrophobic bonds with benzene. The phospholipid head would likely have equal numbers of positively and negatively charged groups that would allow them to form ion-ion interactions helping them pack well and not be bulky. If the heads were still negatively charged they would likely repel each other and be disordered.
The glow-worm begins its life in the autumn as a pale yellow egg. The freshly laid egg is extremely fragile but within a day its surface has hardened into a shell.
Red coloration in wheat seeds is a complex trait influenced by three unlinked genes, each with two different alleles A and a; B and b; C and c. This Punnett square shows the results of a mating between two plants that are both heterozygous at all three loci. The intensity of the red color phenotype is influenced by only one of the gene products. true or false?
Both parents are Pp, using a punnet square will shop that the top left would be PP, the top right is Pp, the bottom left is Pp and the bottom right would be pp.
