In a sample of double-stranded DNA, if the nitrogenous base guanine is 19%, then the nitrogenous base adenine will be 31%
Explanation:
In a double-stranded DNA, the four nitrogenous bases bind and pair together. The purine bases guanine (G) and adenine (A) pair with pyramidine bases cytosine (C) and thymine (T) respectively. The pairing will be between G-C and A-T bases.
According to Chargaff’s Rule, the percentage of each nitrogenous base will be equal in a pair. So the percentage of G will be equal to percentage of C and the percentage of A will be equal to percentage of T.
So if the guanine percentage is 19%, then applying Chargaff’s rule, cytosine will also be 19%
The remaining 68% will be shared with the adenine and thymine pair, of which adenine will be of 31% according to Chargaff’s rule.
Answer:
the immune system attacks the protective sheath (myelin) that covers nerve fibers and causes communication problems between your brain and the rest of your body.
Explanation:
Answer:
C: James-Lange Theory of Emotion; B: Cornea
Explanation:
The James-Lange theory of emotion is a theory proposed independently by two (2) psychologists "William James" and "Carl Lange" and it posits that "<em>emotion is equivalent to the range of physiological arousal caused by external events</em>." This means that for someone to experience emotion, he must first be aroused physically evident in ways such as increased respiration, heart-rate etc., and that their interpretation of such physiological excitement is what leads to emotion in people.
B. Cornea
The eye has 3 layers: The outer layer, the middle layer and inner layer. The outer layer is composed of the sclera, cornea and iris. The sclera is the white eye, the cornea is an opaque tissue, sits in front of the eye and it allows light to enter into the iris.
