Chapter 5 Voclabulary Flashcards Preview

Grade 7 Science > Chapter 5 Voclabulary > Flashcards

Flashcards in Chapter 5 Voclabulary Deck (24):
1

Nucleotide

In a nucleic-acid chain, a subunit that consists of a sugar, a phosphate, and a base

2

Double Helix

Shape of a DNA molecule formed when two twisted DNA strands are coiled together by a springlike structure are held together by hydrogen bonds between the bases

3

Replicate

The process by which by which a double-stranded DNA molecule is copied to produce two identical DNA molecules

4

Chromatin

Long strands of DNA found in the eukaryotic cells nucleus; condense to form chromosomes

5

RNA

Ribonucleic acid, single stranded nuclei can acid that contains sugar ribose

6

Cytosine

Nitrogenous base "C" connects with guanine

7

Inherited

One that is received from a parent and is passed to offspring. Examples: hair, color, and leaf shape

8

Subunit

A term used to describe a part of a larger molecule-a nucleotide is one

9

Rosalind Franklin

A British scientist who's x-Ray photograph of DNA revealed that the structure of DNA was shaped like a helix

10

Watson and Crick

Co-scientists that earned the Nobel prize by presenting the double helix model of DNA

11

Erwin Chargaff

The scientist that discovered Adenine was always equal to the amount of Thymine, and guanine is always equal to cytosine in DNA

12

Phosphate

The part of the nucleotide subunit that forms the sides of the Double helix ladder

13

mRNA

Messenger Ribonucleic acid, the template for protein synthesis; the form of RNA that carries information from DNA to the nucleus

14

tRNA

Transfer Ribonucleic acid, transfers amino acids to the ribosomes to make proteins

15

Ribosomes

Organelles that are the site of protein synthesis

16

Chromosomes

Rod-shaped cellular structure made of condensed chromatin; which carries the genetic information that controls inherited characteristics such as eye color and blood type

17

Mutagen

A physical or chemical agent that changes the nucleic sequence of DNA e.g. UV radiation, nuclear radiation

18

Adenine

Nitrogenous base "A"; connects to thymine

19

Thymine

Nitrogenous base "T"; connects to adenine

20

Guanine

Nitrogenous base "G"; connects to cytosine

21

Sugar

The molecule that is bonded between the phosphate and the base in the DNA and double helix

22

Base

Adenine, Thymine, Guanine, and Cytosil are these in DNA

23

Mutation

Change in DNA sequence that affects genetic information

24

Base Pair

Adenine bonds to Thymine, and Guanine to Cytosil forming these rungs of the DNA ladder