YOU WERE LOOKING FOR: Biology 2nd Semester Final Exam Answers
Enzymes Enzymes are catalysts, chemicals that speed up chemical reactions. The conditions inside most cells do not allow reactions to proceed quickly enough to support life. For example, temperatures inside organisms are not hot enough for chemical...
Photosynthesis, respiration, and digestion are all examples of metabolic pathways, or sequences. Photosynthesis is the metabolic pathway that produces oxygen and glucose in organisms with chlorophyll. Respiration breaks down molecules called ATP for...
Phototaxis c. Photosynthesis d. All of the above Photosynthesis is the process plant cells use to convert oxygen, water and sunlight into a usable form of energy. The product of photosynthesis is glucose sugar molecules. Glucose molecules are a form of potential energy that can be broken down by an organism to produce energy in the form of ATP molecules. Gene c. Protein d. Nucleus A gene is the basic unit of heredity. Genes are made of DNA sequences and act as instructions for making proteins although not all genes make proteins. Genes are found on chromosomes. Double c. Quadruple d. The DNA molecule looks like a twisted ladder and is referred to as a double helix. Each nucleotide contains a sugar molecule and a phosphate group, along with a nitrogen base. Genes are located within the cytoplasm of the cell. Hydrochloric acid c. Ribonucleic acid d. In the ribosome, the information coded onto messenger RNA is used to make proteins.
When sexual reproduction occurs in multicellular organisms, a process takes place before cells fuse whereby a cell is left with half of its chromosomes, enabling the creation of a cell with a characteristic chromosome number. What is this process called? Osmosis c. Anabolism d. Differentiation During meiosis, gametes sex cells are formed by reducing the number of chromosomes found in somatic body cells by one half. This occurs so that when two gametes, one from each parent, fuse together, the embryo will contain the correct number of chromosomes. Without meiosis, offspring cells would contain double the number of chromosomes of normal adults and they would not be viable. Which of the following represents the largest group of biological classification? Kingdom c. Class d. Genus Biology uses a system of classification to group organisms together based on their characteristics.
The levels of classification, from largest most inclusive to smallest most specific , include domain, kingdom, phylum, class, order, family, genus, species. There are two types of cells, eukaryotic and prokaryotic. Which of the following cellular structures are found in both types of cell? Prokaryotic cells are found in bacteria and their structure is much more simple than eukaryotic cells. Prokaryotic cells have a few simple cellular structures such as a nucleoid region, ribosomes, and a plasma membrane.
Eukaryotic cells have more highly developed cellular structures including organelles that support the function of the cell. Golgi apparatus and mitochondria are found in eukaryotic cells. Chloroplasts are found in eukaryotic cells that contain chlorophyll, such as plants. What it is the name given to specialized structures within cells responsible for carrying out specific functions such as providing energy and producing hormones? Mitiosis c. Archaeans d. Organelles Organelles are specialized structures in cells that support the cellular functions.
For example, mitochondria are organelles that synthesize energy; ribosomes synthesize protein; chloroplasts convert sunlight, carbon dioxide and water into oxygen and sugar. Internal complexity c. Size d. Ecological relationships Unicellular organisms are very small compared to most multicellular organisms. If they were as large as a multicellular organism, their surface area to volume ratio would be too low to support life. Staying small gives unicellular organisms a high surface area to volume ratio.
Larger cells have less surface area compared to their volume. Molecules move into the cell, out of the cell and through the cell slowly through the cell membrane. Having a large surface area provides more space for molecules to diffuse across the cell membrane and less of a distance to travel inside the cell to supply organelles with materials needed for metabolism. How many chromosomes does an individual human person have?
What is a polypeptide chain? A long string of amino acids bound together by peptide bonds. When using a codon chart, what are you supposed to read? The mRNA. Who the australian monk that used pea plants and is considered the father of genetics? Gregor Mendel When a sperm fertilizes an egg, the fertilized egg is called a zygote. A monohybrid cross is used to predict how many traits? Anti B antibodies What type of antibodies do type B blood cells have? Anti A antibodies Type AB blood has what antigens on its' surface? Both A and B antigens What blood type is known as the universal recipient and can receive any tipe of blood safely?
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