Correct Answer: B. a taxis

Correct Answer: C. mixed-cropping

Correct Answer: B) 72 beats per minute

Explanation

The question is asking about the rate of heart beat in an adult human being. The options are given in beats per minute and we have to choose the correct one. The correct option is option B, which is 72 beats per minute. The human heart is responsible for pumping blood throughout the body and the rate of heart beat refers to the number of times the heart beats per minute. The heart rate varies from person to person and can be influenced by factors such as age, physical fitness, stress levels, and underlying medical conditions. The average resting heart rate for an adult human being is typically between 60 and 100 beats per minute. Regular physical exercise and a healthy lifestyle can help to lower the resting heart rate, while certain medical conditions or medications may increase it. It is important to monitor heart rate as it can provide important information about overall health and fitness levels. A consistently high or low heart rate may indicate an underlying medical condition that requires attention

Correct Answer: D) Charles

Explanation

The question is asking who was the first scientist to describe the cell. The correct answer is option C, Robert Hooke. Robert Hooke first described the cell in 1665 when he used a microscope to observe a thin slice of cork. He saw small compartments which he called cells because they reminded him of the small rooms in a monastery. Although he did not fully understand the significance of what he saw, his observation was a major breakthrough in the study of life. Theodore Schwann, option A, was a German biologist who developed the theory that all animals are made up of cells. Felix Dujardin, option B, was a French biologist who discovered and named protoplasm, the jelly-like substance that makes up the living part of a cell. Charles, option D, is not a known scientist in biology. Mattlas Schlclden, option E, is not a known scientist in biology. The study of cells is an important part of biology, as cells are the basic unit of life. Cells are the smallest structures that can carry out all the functions of living organisms, and they come in many different shapes and sizes. Understanding the structure and function of cells is essential for understanding how living organisms work and how they interact with their environment.

Correct Answer: D. Organic Evolution

Correct Answer: C) microchondrion

Explanation

The question is asking about where oxidative phosphorylation occurs in aerobic respiration. Aerobic respiration is a process by which cells convert glucose and oxygen into energy, carbon dioxide, and water. Oxidative phosphorylation is the final step of aerobic respiration, where the most ATP (adenosine triphosphate) is produced. ATP is the molecule that provides energy for cellular activities. Option A suggests that oxidative phosphorylation occurs in the cytoplasm, which is incorrect. Cytoplasm is where glycolysis takes place, the first step in aerobic respiration. Option B suggests that lysosomes are involved in oxidative phosphorylation, which is also incorrect. Lysosomes are involved in the breakdown of cellular waste. Option D suggests ribosomes are involved in oxidative phosphorylation, which is incorrect. Ribosomes are involved in protein synthesis. Option C is correct. Oxidative phosphorylation takes place in the mitochondria. Mitochondria are organelles that are involved in cellular respiration, which includes aerobic respiration. Within the mitochondria, there are two membrane systems: the outer mitochondrial membrane and the inner mitochondrial membrane. The inner membrane is where oxidative phosphorylation occurs. In summary, the correct answer to this question is Option C: mitochondrion. Oxidative phosphorylation, the final step of aerobic respiration, takes place in the inner mitochondrial membrane.

Correct Answer: B. 3' refers to the unbound hydroxyl group and 5' refers to the unbound phosphate group at the end of each DNA strand.

Explanation

When nucleotides bond together and form DNA strands, the first and last nucleotides in the strand have slightly different structures than the rest of the nucleotides between them. On one end of the strand, the nucleotide has an exposed hydroxyl group bound to the third carbon in the carbon ring: this end of the strand is thus called 3'. On the opposite end of the strand, the nucleotide has a phosphate group attached to the 5' carbon in the carbon ring, and is thus called the 5' end. These two groups are exposed because they are used in the bonding of nucleotides to one another to form the strand, but each strand ends with one nucleotide that only is bound on one side: thus, leaving either the hydroxyl or phosphate group exposed (depending on which end you are observing). These terms are useful because they allow us to discuss the directionality of DNA-related events- if we didn't have terms for directionality the concept would be much more confusing. Example: DNA polymerase synthesizes the new DNA strand in the 5'-3' direction. Without 3'/5' how would we determine which way the reaction occurs?

Correct Answer: B. nasal cavity

Correct Answer: A) malaria

Explanation

This question is asking which of the listed diseases is not caused directly by bacteria. The correct answer is Option A: malaria. Malaria is caused by a parasite called Plasmodium that is transmitted to humans through the bites of infected mosquitoes. Bacteria, on the other hand, are single-celled microorganisms that can cause a variety of diseases such as tuberculosis, pneumonia, tetanus and cholera. These bacteria can be transmitted through various means such as contact with contaminated surfaces or through the air. It is important to note that while malaria is not caused directly by bacteria, it is still a serious disease that affects millions of people worldwide, particularly in tropical and subtropical regions. Symptoms of malaria include fever, chills, headache, and muscle pain, and it can be fatal if left untreated. In summary, while bacteria can cause a variety of diseases, malaria is not caused directly by bacteria, but rather by a parasite transmitted through the bites of infected mosquitoes.

Correct Answer: C) Mitochondria

Explanation

In a cell, energy is produced in a specific organelle called the mitochondria. The mitochondria are often referred to as the powerhouse of the cell because they are responsible for producing ATP, which is the primary source of energy for the cell. ATP is produced through a process called cellular respiration, which occurs in the mitochondria. The process of cellular respiration involves breaking down glucose and other molecules to release energy, which is then used to produce ATP. The other options listed in the question, such as the nucleus, lysosomes, and nucleolus, do not play a role in energy production. The nucleus contains genetic material and is responsible for controlling cellular activities, while lysosomes are involved in breaking down waste and foreign substances. The nucleolus is involved in the production of ribosomes, which are responsible for synthesizing proteins. It is important to understand the functions of different organelles within the cell, as they all play important roles in maintaining cellular function. For example, the endoplasmic reticulum is responsible for protein synthesis and lipid metabolism, while the Golgi apparatus is involved in the processing and packaging of proteins for secretion. In summary, the correct answer to the question is option C: Mitochondria. To better understand the functions of various organelles within the cell, it is important to study cellular biology in more detail.