DNA contains sugar deoxyribose, while RNA contains sugar ribose,
DNA is a double-stranded molecule, while RNA is a single-stranded molecule.
There may be many forms of a single gene. Each such form is called an allele
Answer:
be part of the cell signaling process
Explanation:
Glycoproteins and glycolipids are proteins and lipids with carbohydrate chain attached to it. They are an important component of the cell membrane with many roles:
- stabilizing membrane structure-because of their ability to bind water molecules via hydrogen bonds
- cell signaling-they are often membrane receptors for the hormones and neurotrasmitters
- cell attachment (adhesion)-for the connection between cells
- cell recognition-they can act as antigens on the cell surface (immune role)
Answer:
Pupillary light reflex refers to the contraction that the pupils present when they light up. In cases of injury to the optic nerve, when the eye where the injured optic nerve is illuminated, since it cannot conduct the stimulus to the brain, neither pupil closes.
Explanation:
Pupillary light reflex refers to the reaction that causes the pupil to close with light thanks to the contraction of the sphincter of the pupil and to open in the dark thanks to the relaxation of that muscle by not receiving any stimulus. A light stimulus reaches the eye and in the retina it is transformed, through a chemical reaction, into an electrical stimulus that will be transmitted through the optic nerve and the visual pathways to the brain. The visual cells of the retina, rods and cones, also act as light receptors that control the pupil's motor activity. Thus, pupil-motor thresholds to light follow the same spectral sensitivity deviations as visual thresholds, which are a function of the state of light adaptation of the retina.
