The n-queens puzzle is the problem of placing n queens on an n x n chessboard such that no two queens attack each other. Given an integer n, return all distinct solutions to the n-queens puzzle. You may return the answer in any order. Each solution contains a distinct board configuration of the n-queens’ placement, where ‘Q’ and ‘.’ both indicate a queen and an empty space, respectively. Example…
Given an input string (s) and a pattern (p), implement wildcard pattern matching with support for ‘?’ and ‘*’ where: The matching should cover the entire input string (not partial). Example 1:Input: s = “aa”, p = “a” Output: false Explanation: “a” does not match the entire string “aa”. Example 2:Input: s = “aa”, p = “*” Output: true Explanation: ‘*’ matches…
1. Which essential mineral nutrient is a component of chlorophyll and is vital for photosynthesis in plants? a. Ironb. Magnesiumc. Zincd. Manganese Answer: b. Magnesium 2. What is the main function of nitrogen in plants? a. Enhancing root developmentb. Facilitating flower formationc. Boosting chlorophyll synthesisd. Improving water uptake Answer: c. Boosting chlorophyll synthesis 3. Which…
Q 1. Among these bacterial components, which is least likely to contain valuable antigens?1. Cell wall2. Flagella3. Ribosomes4. Capsule Answer- c, Ribosomes Q 2. N-acetylmuramic acid and N-acetylglucosamine can be found in which of the following structures?1. Mycoplasmas2. Amoeba3. Ecoli4. Spheroplast Answer- c, Ecoli Q 3. Gram-negative bacteria are associated with endotoxin because of1. Steroids2….
1. Which microorganism is commonly used in the production of antibiotics? a. Saccharomyces cerevisiaeb. Escherichia colic. Penicillium notatumd. Streptococcus pyogenes Answer: c. Penicillium notatum 2. What is the primary function of nitrogen-fixing bacteria in soil? a. Decomposition of organic matterb. Production of antibioticsc. Conversion of atmospheric nitrogen into ammoniad. Fermentation of sugars Answer: c. Conversion…
1. Question: Which vitamin is essential for the synthesis of collagen, a protein that provides structure to connective tissues, skin, and blood vessels?a. Vitamin Ab. Vitamin Cc. Vitamin Dd. Vitamin K Answer: b. Vitamin C 2. Question: Which vitamin is crucial for the proper absorption of calcium and phosphorus, promoting bone health?a. Vitamin Ab. Vitamin…
1. What is a virus primarily composed of? a. Nucleic acid and protein coatb. Lipids and carbohydratesc. Enzymes and organellesd. Cell membrane and cytoplasm Answer: a. Nucleic acid and protein coat 2. Which type of nucleic acid can be found in a virus? a. DNA onlyb. RNA onlyc. Both DNA and RNAd. Neither DNA nor…
Q 1. Which of the following organelles uses hydrolytic enzymes to manage intracellular macromolecule digestion?1. Plastid2. Peroxisome3. Lysosome.4. Actin Answer- Option (3) is correct. Q 2. Which one is not a lysosome’s hydrolytic enzyme?1. Aldolase,2. Phosphatases,3. Sulfatases,4. Lipases. Answer- Option (4) is correct. Q 3. What are amphisomes?1. The early endosome.2. Fusion of the endosome…
1. Which type of muscle is under voluntary control? a. Smooth muscleb. Cardiac musclec. Skeletal muscled. Involuntary muscle Answer: c. Skeletal muscle 2. What is the structural and functional unit of a muscle? a. Sarcomereb. Myofibrilc. Muscle fiberd. Myosin filament Answer: a. Sarcomere 3. Which protein is responsible for the sliding movement of actin and…
1. What is the primary function of antibodies in the immune system? a. Directly kill pathogensb. Phagocytosisc. Activate complement systemd. Neutralize and tag pathogens Answer: d. Neutralize and tag pathogens 2. Which cells are responsible for the production of antibodies in the immune system? a. T cellsb. B cellsc. Natural killer cellsd. Macrophages Answer: b….
