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DNA 2014 #1

Test Description: DNA basics

Instructions: Answer all questions to get your test result.

1) Base pairing rule states that the DNA of any species contains equal amount of cytosine and

Aadenine Biodine Cthymine Dguanine

2) The two sides of the DNA double-helix are held together by

Aionic bonds Bsugars Ccovalent bonds Dhydrogen bonds

3) What two scientists discovered the basic structure of DNA?

AWalsh and Neil BCrocket and Tubbs CWatson and Crick DNelson and Smith

4) Where in a cell are proteins made?

Aribosomes Bnucleus Cribose DGolgi Apparatus

5) How many strands of nucleotides does mRNA have?

A2 B3 C4 D1

6) What two organelles is DNA also found inside a cell?

Amitochondria and centrioles Bmitochondria and chloroplasts Cmitochondria and cytoplasm Dchloroplasts and muscle

7) What is the basic difference between purines and pyrimidines?

Apurines are double-ringed; pyrimidines are single-ringed Bpurines are found only in male organisms Cpurines are single-ringed; pyrimidines are double-ringed Dpurines are only found in DNA; pyrimidines are found in DNA and mRNA

8) How many genes do humans have?

A30,000 B120,000 C46 D23

9) Why is Iceland the perfect place to look for genes causing disease?

Apeople there are all older than 25 years old Ball of the people that live there are probably related somehow Cthe climate makes it easier to study genes Dit is a secluded island

10) What does DNA stand for?

Adeoxyribosenucleic acid Bdeoxygenribonucleic acid Cdeoxyribonucleic acid Ddeoxyribonucleus acid

*select an answer for all questions

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