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.
It involves chromosomal abnormality; w<span>hen the condition is caused by trisomy 21, (down syndrome), the </span>chromosomal abnormality<span> occurs as a random event during the formation of reproductive cells in a parent. The </span>abnormality<span> usually occurs in egg cells, but it occasionally occurs in sperm cells.
I hope this answers your question. =)</span>
Answer: progressive resistance exercises.
Explanation:
Progressive resistance exercises are the exercises that are performed to increase the muscular strength of the body. In these exercises the participants exercise their muscles against a resistant surface or object. This process increases the strength progressively. The material used in progressive resistance exercises includes the machines, elastic bands and free weights. These type of exercises involve both concentric and eccentric contractions.
Answer:
Describe the factors that influence the level of cardiorespiratory fitness a person is able to achieve?
Explanation:
The factors that influence cardiorespiratory fitness are age, gender, genetics, body composition, and a person's level of conditioning. Aerobic exercise forces the body to provide extra oxygen to the muscles.
