Sunday 24 March 2013

Biology posts:


1.Throughout which phase of mitotic cycle would DNA be present in the least amount in a nucleus?
A. Anaphase
B. Interphase
C. Metaphase
D. Telophase

2.At prophase of mitosis, a eukaryote chromosome consists of two chromatids.
What is the structure of a single chromatid?
A. One molecule of single stranded DNA coiled around protein molecules
B. Two molecules of single stranded DNA each coiled around protein molecules
C. One double helix of DNA coiled around protein molecule
D. Two double helices of DNA each coiles around protein molecules

3.If the nucleus of a human motor neurone contains 6.8 (pg) of DNA, what mass of DNA is the nucleus of an actively dividing human shin cell likely to contain at the end of interphase?
A. 3.4 pg
B. 6.8 pg
C. 13.6 pg
D. 20.4 pg


1.D
2.C  
3.C

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