Free radicals can be damaging because they are _____.

a) unstable
b) highly reactive
c) radioactive
d) both unstable and highly reactive


Ans: d) both unstable and highly reactive

Biology & Microbiology

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Which component is the oxidizing agent in the following chemical reaction?

4 Fe + 3 O2 ? 2 Fe2O3 a. rust b. iron c. water d. oxygen e. hydrogen

Biology & Microbiology

In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another gene locus on the same chromosome, there is a dominant gene for red eyes and its recessive allele for purple eyes. A male that was heterozygous at both gene loci was mated with a female that was homozygous for both recessive alleles and the following results were observed among the offspring:Normal wings and red eyes - 420Vestigial wings and red eyes - 80Normal wings and purple eyes - 70Vestigial wings and purple eyes - 430According to these data, what is the distance, in centimorgans, between these 2 gene loci? (Enter the number only without the units. For example, 100 cM would be entered as 100) 

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Which process is necessary to prevent the doubling of genome size during sexual reproduction?

a) apoptosis b) meiosis c) mitosis d) metastasis e) contact inhibition

Biology & Microbiology

The marine protists with pore-studded shells called tests belong to which group?

A. sarcodina B. rhodophyta C. foraminifera D. chlorophyta

Biology & Microbiology