Answer the following question given this paragraph: Photosynthesis begins with the light reactions. It is during these reactions that the energy from sunlight is absorbed by the pigment chlorophyll in the thylakoid membranes of the chloroplast. The energy is then temporarily transferred to two molecules, ATP and NADPH, which are used in the second stage of photosynthesis. ATP and NADPH are generated by two electron transport chains . During the light reactions, water is used and oxygen is produced. These reactions can only occur during daylight as the process needs sunlight to begin. Q: What is produced during the light reactions in photosynthesis? Choices: - carbon - waste - nitrogen - oxygen A:
oxygen
(Question)
Answer the following question given this paragraph: develops from myoblasts derived from the mesoderm. Myocytes and their numbers remain relatively constant throughout life. Skeletal muscle tissue is arranged in bundles surrounded by connective tissue. Under the light microscope, muscle cells appear striated with many nuclei squeezed along the membranes. The striation is due to the regular alternation of the contractile proteins actin and myosin, along with the structural proteins that couple the contractile proteins to connective tissues. The cells are multinucleated as a result of the fusion of the many myoblasts that fuse to form each long muscle fiber. Cardiac muscle forms the contractile walls of the heart. The cells of cardiac muscle, known as cardiomyocytes, also appear striated under the microscope. Unlike skeletal muscle fibers, cardiomyocytes are single cells typically with a single centrally located nucleus. A principal characteristic of cardiomyocytes is that they contract on their own intrinsic rhythms without any external stimulation. Cardiomyocyte attach to one another with specialized cell junctions called intercalated discs. Intercalated discs have both anchoring junctions and gap junctions. Attached cells form long, branching cardiac muscle fibers that are, essentially, a mechanical and electrochemical syncytium allowing the cells to synchronize their actions. The cardiac muscle pumps blood through the body and is under involuntary control. The attachment junctions hold adjacent cells together across the dynamic pressures changes of the cardiac cycle. Smooth muscle tissue contraction is responsible for involuntary movements in the internal organs. It forms the contractile component of the digestive, urinary, and reproductive systems as well as the airways and arteries. Each cell is spindle shaped with a single nucleus and no visible striations (Figure 4.18). Q: Skeletal muscle tissue is arranged in bundles surrounded by this? Choices: - cartilage - epithelial tissue - soft tissue - connective tissue A:
(Answer)
connective tissue
Ques: Answer the following question given this paragraph: Phototrophic organisms capture light energy from the sun and convert it into chemical energy inside their cells. Q: Phototrophic organisms capture light energy from the sun and convert it into what type of energy inside their cells? Choices: - solar power - mechanical energy - radiation energy - chemical energy A:
Ans: chemical energy
(Q).
Answer the following question given this paragraph: Elements are pure substances with unique properties. There are more than 100 different elements (92 of which occur naturally). The smallest particles of elements are atoms. Q: What do you call pure substances with unique properties? Choices: - structures - arrangements - originals - elements A:
(A).
elements
Ques:Answer the following question given this paragraph: Lysosomes are vesicles that are formed by the Golgi apparatus. They contain powerful enzymes that could break down (digest) the cell. Lysosomes break down harmful cell products, waste materials, and cellular debris and then force them out of the cell. They also digest invading organisms such as bacteria. Lysosomes also break down cells that are ready to die, a process called autolysis. Q: What is the name of vesicles that are formed by the golgi apparatus? Choices: - vessels - lymphocytes - capillaries - lysosomes A:

Ans:lysosomes
Answer the following question given this paragraph: Homeobox genes are involved in the regulation of genes important to development. They encode transcription factors. Q: What types of genes encode transcription factors? Choices: - glycosyl transferases - isozyme genes - rohail genes - homeobox genes A:
homeobox genes