Which essential mineral is provided by a diet rich in whole grains?
A) calcium
B) magnesium
C) potassium
D) beta-carotene
C
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A person who is homozygous recessive for this defective gene often suffers from severe
pancreatitis, which can be deadly. A treatment that replaces this gene is __________.
a. gene therapy b. genomics c. therapeutic cloning d. a genetic marker
What is the rat to human ratio in most major
cities?
a. 10:1 b. 20:1 c. 1:10 d. 1:25 e. 1:100
A reddish chemical, lipofuscin, is found in greater quantities in cells of older people than in those from younger people. This chemical should be broken down in the cells. Which specific type of organelle is not working as well in the seniors?
A) lysosome B) mitochondrion C) nucleus D) rough endoplasmic reticulum
The Cl- ion has a single negative charge and the atomic number of 17. How many electrons are on its innermost shell?
A) 9 B) 18 C) 17 D) 2