7691292
Description
Flashcards by Urooj Shafi, updated more than 1 year ago
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Created by Urooj Shafi
over 7 years ago
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| Question | Answer |
| What does DNA stand for? | Deoxyribonucleic Acid |
| What is DNA? | DNA, or Deoxyribonucleic Acid, is the heredity material in humans and almost all organisms. |
| What four bases are found in DNA? | . Adenine . Thymine . Guanine . Cytosine |
| what is the Watson-Crick model? | Watson-Crick Structure of DNA. Deoxyribonucleic Acid (DNA) is a double-stranded, helical molecule. It consists of two sugar-phosphate backbones on the outside, held together by hydrogen bonds between pairs of nitrogenous bases on the inside. |
| How many parts do Nucleotide molecules have? | they have three parts which are - - Phosphate group - Deoxyribose sugar - One of the four nitrogen-rich bases |
| What are chromosomes ? | a thread-like structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes. |
| what do chromosomes consist of? | Chromosomes are made up of DNA and protein. The proteins are histones, and the DNA is wrapped around the histones. |
| How many chromosomes are in your body cells ? | In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46. |
| What are Gametes? | Gametes are Eggs and sperm |
| What chromosome determines whether you are a female or male ? | In Females the sex chromosome is XX In Males the sex chromosome is XY |
| What are Autosomes? | Any chromosome that is not a sex chromosome. |
| What are Homologous Chromosomes? | One chromosome of each homologous pair comes from the mother (called a maternal chromosome) and one comes from the father (paternal chromsosome) |
| Where is the DNA found in Plants? | In plants the DNA is found in the Chlorplasts. |
| What are Genes? | a unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring. |
| Where is DNA found in an organism? | In organisms called eukaryotes, DNA is found inside a special area of the cell called the nucleus. |
| What is the difference between one gene and the other? | - Order of bases along the DNA strand - Number of bases in that section of DNA |
| list the proteins that our cells need to survive and function well? | - structural, such as collagen found in tendons and ligaments and keratin found in skin, hair, nails. - Regulatory, such as growth hormone which stimulates growth and cell reproduction |
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