45 Biology Worksheets

 811. The event that does not occur in the dark reaction of photosynthesis is… 

A. Binding of CO2 in the stroma B. Fixation of CO2 by RuBP C. Formation of phosphoglycerol acid D. Breakdown of water molecules E. Reduction of phosphoglycerol 3-phosphate 

812. The following are true statements about the process of photosynthesis, except… A. The O2 formed comes from the breakdown of H2O B. The dark reaction uses CO2 as a raw material to form carbohydrates. C. Glucose formation takes place in the grana of chloroplasts. D. The H2O utilized is taken from the soil. E. The dark reaction requires ATP and NADPH2 produced from the light reaction. 

813. The following processes are related to glycolysis, except… A. The energy investment stage requires 2 ATP. B. The energy harvest stage produces 4 ATP. C. The energy harvest stage produces NADH. D. This is the process of oxidative phosphorylation. E. The stage of formation of 2 molecules of pyruvic acid. 

814. One of the stages of cellular respiration is glycolysis. In this stage, the conversion occurs… A. Glycogen to glucose. B. Glucose (6C) to pyruvic acid (3C). C. Pyruvic acid (3C) to acetyl-CoA (2C). D. Acetyl-CoA (2C) to CO2 (1C). E. NADH and FADH2 to ATP. 

815. In the electron transport chain, the molecule that acts as the final electron acceptor is... A. CO2 B. O2 C. H2O D. ATP E. NADH 

816. In aerobic respiration, oxygen plays a role in the process... A. Glycolysis B. Formation of Acetyl Co-A C. Krebs cycle D. Electron transport system E. Formation of ATP 

817. Darwin's statement that adaptive changes in organisms will enable them to survive and produce offspring is a concept related to the process... A. Natural selection B. Genetic mutation C. Phenotypic variation D. Productive isolation E. Environmental adaptation

817. Darwin's statement that adaptive changes in organisms will enable them to survive and produce offspring is a concept related to the process of... A. Natural selection B. Genetic mutation C. Phenotypic variation D. Productive isolation E. Environmental adaptation 

818. As living cells, bacteria are classified as prokaryotes because... A. Bacteria have a cell structure consisting of a membrane, nucleus, and cytoplasm B. Bacteria do not have a cell nucleus C. Bacteria do not have a nuclear membrane D. Bacteria are cosmopolitan E. Bacteria are protists; bacteria are cosmopolitan 

819. In chickens, wattle shape is caused by the following gene interactions: rrP-: Seed, R-pp: Ros, R-P: Walnut, and rrpp: Single. A cross was conducted between a chicken with a seed wattle and a chicken with a rose wattle. Some of the F1 offspring had single wattles. From the results of this cross, it is known that the genotypes of both parents are: A. RrPp x rrPp B. rrPP x Rrpp C. rrPp x Rrpp D. rrPp x RRpp E. rrPp x rrpp 

820. Look at the following picture of gametes. If the two gametes come from two animals of the same species, then... 1. The resulting embryo will be male. 2. Each embryonic cell has the same chromosome content. 3. Each gamete has a sex chromosome. 4. Each gamete has an autosome. 

821. Heterosporous ferns have the following characteristics, except... A. Reproduce sexually and asexually. B. Produce two forms of sexual organs. C. Produce microspores and macrospores. D. Produce two types of spores of different sizes, of the same sex. E. Produce two types of spores in separate individuals. 

822. The ground tissue of plants that can function as food storage and the site of photosynthesis. and as a tissue that fills the vascular bundles is... A. Parenchyma B. Collenchyma C. Sclerenchyma D. Collenchyma and parenchyma E. Sclerenchyma and parenchyma 

823. No. Respiration Stage Site of Production 1. Glycolysis Mitochondrial Acid 2. Krebs Cycle Mitochondrial Matrix CO2 3. Electron Transport Mitochondrial Inner Membrane ATP 4. Respiratory Chain Glycolysis NADH2 The correct answer is: A. 1 and 2 D. 2 and 4 B. 1 and 3 E. 3 and 4 C. 2 and 3

824. In the process of photosynthesis, the dark reaction requires ATP produced in the light reaction stage. BECAUSE: In the dark reaction, fixed CO2 is synthesized into carbohydrates in the stroma with the help of ATP energy. Answer A 825. Elephantiasis is a type of disease caused by worms that is transmitted by: A. Rats D. Cockroaches B. Mosquitoes E. Flies C. Snails 826. Birds have a more complex respiratory system than mammals. BECAUSE: Birds have air sacs that act as substitutes for lungs during flight. Answer D 

825. Human blood circulation flows through the following sequence: A. Right ventricle - left ventricle - right atrium - left atrium B. Right ventricle - aorta - cava - vena cava - left atrium C. Left ventricle - aorta - cava - vena cava - right ventricle D. Right ventricle - pulmonary artery - pulmonary artery - pulmonary vein - left atrium E. Left ventricle - vena cava - pulmonary vein - pulmonary vein - right atrium 

826. The arm flexion movement involving the biceps and triceps muscles demonstrates the characteristics of muscle ability, specifically the following properties: 1. Elasticity 2. Extensibility 3. Flexibility 4. Contractibility Answer A 

827. Alveoli have walls composed of stratified squamous epithelium and are elastic because they are bubble-like structures where gas diffusion occurs in the lungs. 

828. Hybridoma technology can used to produce monoclonal antibodies. Hybridoma technology is the fusion of the nucleus of a rapidly dividing cancer cell with a cell producing the desired antibody. 

829. The pancreas, as an exocrine gland, produces: A. Insulin to regulate blood sugar levels B. Glycogen to lower glucose levels C. Pepsin to break down protein D. Lipase to break down fat E. Hormones to regulate body metabolism

830. The cell organelle below functions as a site of metabolism, producing adenosine triphosphate... A. Mitochondria and Chloroplasts B. Chloroplasts and centrosomes C. Centrosomes and mitochondria D. Lysosomes and mitochondria E. Golgi apparatus and chloroplasts

831. Diseases caused by viruses are... A. Smallpox - anthrax - cholera B. Dysentery - syphilis - polio C. CPVD - rabies - polio D. Dengue fever - measles - meningitis E. Syphilis - jaundice - gonorrhea 

832. The following animals are vectors of the Clonercis sinensis worm: 1. Shellfish 2. Fish 3. Squid 4. Snails Fish only 

833. During mitosis, the following events occur, except: A. chromosome duplication B. initial division of the gamete stem cell C. multiplication of the somatic cell system D. development of the cellular information system E. separation of paired chromosomes into single ones 

834. The formation of new species can be caused by reproductive isolation. CAUSE: Reproductive isolation can occur due to ecological separation of populations. 

835. During aerobic respiration, pyruvic acid and carbon dioxide are produced during... A. Glycolysis and electron transport B. Electron transport and oxidative decarbonylation C. Cytochrome C and Krebs cycle D. Glycolysis and Krebs cycle E. Oxidative decarbonylation and acetyl-CoA synthesis 

836. Which statement relates to fat digestion in the small intestine? A. Fat is digested into fatty acids and glycerol with the help of gastric juice and pepsin B. Fat is digested into fatty acids and glycerol with the help of intestinal juice and trypsin C. Fat is digested into fatty acids and acetyl-CoA with the help of intestinal juice and trypsin D. Fat is emulsified into fatty acids and glycerol by bile and lipase E. Fat is emulsified by bile and then broken down into fatty acids and glycerol by pepsin 

837. An area that is not an in-situ biodiversity conservation area is... A. Botanical garden B. Nature reserve C. Protected forest D. National plantation E. Wildlife sanctuary 

838. An individual has the genotype AaBbCc. If there is a linkage between genes A-B and a-b in meiosis, then the possible types of gametes formed are... A. ABC, Abc, Abc, ABC B. ABC, ABc, abC, abc C. Abc, abc, aBc, Abc D. ABC, Abc, abC, aba E. Abc, AbC, abc, aBc 

839. The following animals live in water, have backbones, have caudal fins, mammary glands, are warm-blooded, and communicate by means of sound reflection, except... A. Shark B. Whale C. Irrawaddy dolphin D. Dugong E. Dolphin 

840. The correct example of a plant with parallel veins, distinct stem segments, fibrous roots, a scattered vascular system, and a single seed leaf is... A. Grass, bamboo, and papaya B. Corn, sugarcane, and grass C. Cassava, sugarcane, and grass D. Corn, sugarcane, and bamboo E. Orange, bamboo, and sugarcane

840. A correct example of a plant with parallel leaf veins, distinct stem segments, fibrous roots, a scattered vascular system, and a single seed leaf is... A. Grass, bamboo, and papaya B. Corn, sugarcane, and grass C. Cassava, sugarcane, and grass D. Corn, sugarcane, and bamboo E. Oranges, bamboo, and sugarcane 

841. Rhodoplasts are plastids that contain pigments A. Chlorophyll B. Carotene C. Anthocyanin D. Phytocerithrin E. Phycoxanthin 

842. Nitrogen availability in the soil can be increased with the help of Rhizobium bacteria BECAUSE Rhizobium bacteria are able to fix N2 from the air through a mutualistic symbiosis with the root nodules of leguminous plants. Answer C 

843. The specific pathway of a chemical through the biogeochemical cycle varies according to the elements and trophic structure of an ecosystem. The elements that cycle on a global scale are... 1. Phosphorus 2. Carbon 3. Calcium 4. Nitrogen Answer E 

844. A bone disorder in which the spine curves to the left or right is called... A. Kyphosis B. Lardosis C. Arthritis D. Lordosis E. Scoliosis