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alexandr402 [8]
3 years ago
10

Which of the statements describes characteristics of eukaryotic cells but not of prokaryotic cells? O two or more linear chromos

omes, dynamic membrane system, diverse means of harvesting and utilizing energy under anaerobic conditions O relatively large genome, dynamic cytoskeleton, compartmentalized metabolic processes O linear chromosomes, endomembrane system, nucleus, diverse means of harvesting and utilizing energy under anaerobic conditions O two or more circular chromosomes, dynamic membrane system, compartmentalized metabolic processes
Biology
1 answer:
gtnhenbr [62]3 years ago
3 0

O relatively large genome, dynamic cytoskeleton, compartmentalized metabolic processes

Explanation:

Eukaryotic cells also contain other membrane-bound organelles such as mitochondria and the Golgi apparatus, and in addition, some cells of plants and algae contain chloroplasts. Unlike unicellular archaea and bacteria, eukaryotes may also be multicellular and include organisms consisting of many cell types forming different kinds of tissue. 

DNA is located in the nucleus, the mitochondria and the chloroplasts (occuring only in plants and some protists). The nucleus contains most DNA. It is present in this compartment in the form of linear chromosomes that together constitute the genome.

Eukaryotic cells generally use aerobic respiration – requiring oxygen – to produce usable energy called ATP from glucose molecules. ... Prokaryotic cells, on the other hand, tend to use anaerobic respiration – not requiring oxygen.

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A person had bread and butter for his breakfast. Trace the changes in the main components of these during its passage through th
Papessa [141]

When the bread and butter is in mouth, mechanical digestion starts. The size of the food gets reduced and it mixes with saliva for easy swallowing. The salivary amylase in saliva begins the digestion of starch in the bread. This is the start of chemical digestion. When the undigested bread and butter reached the stomach, lower esophageal sphincter relaxes and allow the chewed food to enter. The gastric secretions containing HCl, acts on the undigested food to produce chime. HCl kill the microorganism on the food and also denatures the protein and later attacked by digestive enzyme pepsin. Pepsin breakdown protein in the bread, butter . Later on gastric lipase begins to digest fat present in butter. Digestion of the starch in bread does not occur in the stomach because the salivary amylase that began chemical digestion in mouth became inactive in the presence of HCl. Further the chime enters the small intestine where bile secreted by the gall bladder emulsifies the fat and break into small globule which helps in fat absorption.

7 0
3 years ago
In which sections or section of the kidney is the urine formed? what section of the kidney collects the urine? how does the urin
torisob [31]

In which sections or section of the kidney is the urine formed? 

The final product of filtration, reabsorption, and secretion which is the urine is primarily formed in the renal medulla although the formation of the urine starts with the filtration of blood in the glomerulus then along the proximal tubules, descending and ascending loop of Henle, distal tubules, and collecting ducts. 


What section of the kidney collects the urine? 

The renal pelvis is the main section of the kidney that collects the urine. The renal pelvis arises from the confluence of the collecting ducts forming the renal papilla then the minor calyx and the major calyx and ultimately to the renal pelvis to be transported to the urinary bladder through the ureters.


How does the urine move from the kidney out of the body? 

The urine will be collected in the renal pelvis. With the urine collected in the renal pelvis, the urine moves from the renal pelvis to the urinary bladder through the ureters and will be stored in the urinary bladder. When there is an urge to urinate, the urinary bladder contracts and the urethral sphincter relaxes that allows passage of the urine from the bladder out of the body through the urethra.


In which main regions of the kidney are the glomerulus and the Bowman's capsule located? 

The glomerulus and the Bowman’s capsule are part of the renal cortex. These organs are responsible for the filtration of the blood from the afferent arteriole. The glomerulus and the Bowman’s capsule are not synonymous but rather the glomerulus comes from the afferent arteriole and the Bowman’s capsule functions as a filtration membrane. Together, they are called the renal corpuscle.


In which main regions of the kidney are the collecting ducts and the loop of Henle located?

The collecting ducts are located in the renal medulla whereas the loop of Henle are partly in the medulla, depending on the type of nephron. In superficial cortical nephrons, the dips only up to the outer medulla while in the juxtamedullary nephrons, the glomerulus is near the corticomedullary border wherein more parts of the loop of Henle is in the medulla.

3 0
3 years ago
What is the main difference between active and passive transport?
Dovator [93]

Answer:

B)the energy required

Explanation:

The difference between active and passive transport is in the amount of energy they both require.

  • Active transport requires energy to move molecules such as ATP and ions against a concentration gradient.
  • Passive transport moves molecules from higher concentration region to one with lower concentration without requiring energy.

Energy is the ability to do work. In passive transport, energy is not used. But in active transport, energy is required.

8 0
3 years ago
All of the following are true of spermatogenesis EXCEPT: Question 18 options: DNA replicates once, but cells divide twice. The p
jolli1 [7]

Answer:

  • One spermatogonium produces 4 spermatids FALSE. One primary spermatocyte produces 4 spermatids.

Explanation:

Germ cells are diploid reproductive cells in charge of gamete production. Germ cells divide by mitosis and meiosis. Through mitosis, they originate more sexual cells, but through meiosis, they produce gametes -sperm and egg cells-. This process is known as gametogenesis.

Gametes´destiny is to merge during fecundation, and a new diploid cell called zygote emerges through fertilization. The zygote is a complete cell and suffers successive mitosis to form the new organism.

Spermatogenesis is the process of production and maturation of sperm cells. Spermatogonia are the masculine diploid germ cells, carrying 46 chromosomes. These germ cells suffer mitosis to reproduce. Some of them stay as spermatogonia, and some others become primary spermatocytes, which are in charge of gamete production. Primary spermatocytes are also diploid cells, meaning that they still carry 46 chromosomes.

Each primary spermatocyte replicates its genetic material and then goes through meiosis I to produce two daughter haploid cells called secondary spermatocytes, each of them carrying 23 chromosomes. Each secondary spermatocyte will produce two other haploid daughter cells by meiosis II.

The total result from the two cellular divisions of each primary spermatocyte is four haploid daughter cells called spermatids.

During spermiogenesis, spermatids mature into spermatozoa or sperm cells. Each sperm cell characterizes by being composed of a head, midpiece, and tail.

  • DNA replicates once, but cells divide twice TRUE
  • The products are spermatozoa that each have a head, midpiece, and tail TRUE  
  • Spermatids containing 23 chromosomes (1n) are produced TRUE
  • One spermatogonium produces 4 spermatids FALSE. One primary spermatocyte produces 4 spermatids.
  • Genetically diverse spermatids are created TRUE
4 0
2 years ago
Organic chemistry is currently defined as
Airida [17]

Answer:

B

Explanation:

Organic chemistry is defined as the study of carbon compounds.

Organic compounds were first thought to be compounds that could only be produced by living organisms. This theory was disproved when scientists synthetically made urea from ammonia in a lab.

Organic compounds are now known as compounds where carbon atoms are covalently bonded to other elements. This could be hydrogen or oxygen (in the case of lipids or carbohydrates) or nitrogen (in the case of amino acids).

3 0
3 years ago
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