2 What is the process of making mRNA from DNA called? A Translation B Transcription C Replication D Mutation
4 Which organ system includes the brain and spinal cord and helps control and coordinate body activities? A Endocrine system B Nervous system C Muscular system D Circulatory system
5 Lipids are made up of which two building blocks? A Amino acids and glycerol B Glycerol and fatty acids C Monosaccharides and fatty acids D Nucleotides and glycerol
6 Which human organ system includes the heart, blood vessels, and blood? A Respiratory system B Digestive system C Circulatory system D Nervous system
7 Which type of fatty acid has no double bonds between carbon atoms? A Saturated B Unsaturated C Monounsaturated D Polyunsaturated
8 What is the main function of the xylem in a plant? A Transport of sugars B Transport of water and minerals C Gas exchange D Photosynthesis
9 The double-helix model of DNA was proposed by: A Watson and Crick B Chargaff C Meselson and Stahl D Hershey and Chase
10 Which scientists proposed the double-helix model of DNA? A Mendel and Morgan B Watson and Crick C Darwin and Wallace D Pasteur and Koch
11 The process of sweating helps to cool the body by: A Increasing heat production B Evaporation of water from the skin C Constricting blood vessels D Shivering
12 Which of the following is NOT a function of the skeletal system? A Support B Protection C Production of blood cells D Transport of oxygen
13 Homeostasis refers to: A The process of cell division B Maintaining a stable internal environment C The movement of molecules across membranes D The breakdown of food
14 Which of the following is NOT a function of lipids? A Long-term energy storage B Thermal insulation C Catalyzing chemical reactions D Forming cell membrane structure
16 Which type of fatty acid contains double bonds between carbon atoms? A Saturated fatty acid B Unsaturated fatty acid C Trans fatty acid D Essential fatty acid
19 A scientist is studying a molecule that is a polymer of amino acids. What type of biomolecule is it? A Carbohydrate B Lipid C Protein D Nucleic acid
20 What is homeostasis? A The process of cell division B The maintenance of a stable internal environment C The movement of molecules from high to low concentration D The breakdown of food by enzymes
21 When you are too hot, your body produces sweat. This is an example of: A Osmoregulation B Thermoregulation C Regulation of blood glucose D Regulation of oxygen
23 Which of the following is a saturated fatty acid? A Oleic acid B Linoleic acid C Stearic acid D Linolenic acid
24 The waxy cuticle on a leaf helps to: A Increase water loss B Reduce water loss C Absorb more sunlight D Transport sugars