Abeka Biology Chapter 24 Flashcards Preview

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Flashcards in Abeka Biology Chapter 24 Deck (16):
1

What two biochemists deduced the actual structure of DNA?

James D. Watson, and Englishman Francis H. C. Crick.

2

What is the part of the DNA molecule that controls a particular trait?

gene

3

How many chromosomes does each somatic cell contain?

46 chromosomes

4

True of False: Each cell of your body contains enough information in its DNA to fit a library of about one thousand books.

True

5

What are the "spools" called that the DNA molecule coils around?

histones

6

What is it called when a group of 8 histones are clustered together?

nucleosome

7

True of False: The bundles of tightly coiled DNA are the chromosomes that are invisible during mitosis and meiosis.

False. They are visible during meiosis and mitosis.

8

What two nucleic acids are composed of special molecules called nucleotides?

DNA and RNA

9

What is the name for the twisted ladder-like structure in the DNA?

double helix

10

What are the four different types of bases that can make up the "rung" in a DNA molecule?

Guanine, cytosine, adenine, and thymine

11

What is the process in which only one type of base will "fit"another?

base pairing

12

In RNA, which base replaces thymine?

uracil

13

What is the process by which DNA makes a copy of itself before cell division?

replication

14

Through what process does the cell copy the information contained in the DNA into messenger RNA molecules?

transcription

15

Through What process do mRNA molecules provide the information to the ribosomes to make protein molecules?

translation

16

Pg 512

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