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Questions in biology

📝 Answered - Cardiac muscles are considered smooth muscles. Please select the best answer from the choices provided. A. True B. False

📝 Answered - Living organisms do not play a role in the water cycle. Please select the best answer from the choices provided. A. True B. False

📝 Answered - A. Having allosteric enzyme set up? Inhibitor binds to active site to speed up the reaction B. Inhibitor binds to regulatory site to increase rate of reaction C. Activator binds to regulatory site to activate the reaction. D. Activator binds to active site to initiate the reaction Which of the following is correct about the movement of water in plants? A. moves against a water potential gradient B. across the phloem tissue by diffusion C. by using energy until it reaches to the xylem. D. across the tissues of a plant by osmosis. What will happen to the growth of the plant when you remove indole-acetic acid from the main shoot part of the plant? A. The plant will bush out B. It stimulates dropping of leaves. C. The growth of side shoots will slow down. D. The main shoot of the plant elongates

📝 Answered - Which molecule would be the most affected by limited nitrogen? A. myofibrillar proteins in muscle B. glucose molecules in starch C. fat molecules surrounding organs D. cellulose molecules in plant cell walls

📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

📝 Answered - The element nitrogen is needed to form A. fat. B. protein. C. starch. D. sugar.

📝 Answered - Which row correctly shows an advantage of feeding babies breast milk and an advantage of feeding them bottle milk? | | advantage of breast feeding | advantage of bottle feeding | |---|--------------------------------------------------------------|------------------------------------------------------------------| | A | Feeding helps create a bond between mother and baby. | Bottle feeding is cheaper. | | B | It is easier to control the amount of milk the baby receives. | The baby receives antibodies from the mother. | | C | The milk contains exactly the right balance of nutrients. | Other people besides the mother can feed the baby. | | D | The baby is less likely to suffer from diarrhoea. | HIV is less likely to be transmitted from mother to baby.

📝 Answered - A grass starts with [tex]$30,000 kJ$[/tex] of energy. How much energy would a cheetah acquire after the grass? A. 30 kJ B. 300 kJ C. [tex]$3,000 kJ$[/tex] D. [tex]$30,000 kJ$[/tex]

📝 Answered - A food is known to contain protein, but no reducing sugar. When this food is tested with biuret solution and Benedict's solution, which colors would a student observe? | | Biuret test | Benedict's test | |---|---|---| | A | blue | blue | | B | blue | brick red | | C | lilac/violet | blue | | D | lilac/violet | brick red |