Why is it important that the alcohol used in the DNA extraction is kept cold? Helps to precipitate the proteins at the interface between the aqueous and alcohol layers, as the solubility of any compound is reduced at lower temperatures. The colder the temperature of alcohol, the greater the yield. Helps to precipitate the DNA in the aqueous layer, as the solubility of any compound is reduced at lower temperatures. The colder the temperature of alcohol, the greater the yield. Helps to precipitate the DNA at the interface between the aqueous and alcohol layers, as the solubility of any compound is reduced at lower temperatures. The colder the temperature of alcohol, the greater the yield. Helps to precipitate the DNA in the alcohol layer, as the solubility of any compound is reduced at lower temperatures. The colder the temperature of alcohol, the greater the yield.

Q: In what quadrant would the majority of the stomach belocated? In which region(s)?

A: tThe abdomen cavity can be divided into 4 quadrants- the left upper, left lower, right upper, right ...

Q: Define glycogenesis

A:  Carbohydrates are the most important storage molecules that get metabolized to serve the body's ene...

Q: Which of these vessels labelled “A” and “B” is an artery

A: An important component of the circulatory system is found to be blood vessels. They perform the tran...

Q: Some Stages of Embryonic Development   Gastrulation Zygote Implantation Blastocyst The order in wh...

A: Fertilization is a process whereby two gametes fuse together to form a zygote in the . In humans, eg...

Q: Define tegmentum

A: The central organ of the human nervous system is referred to as the brain. It makes up the central n...

Q: Previously, birth control methods involving hormones were created only for females. However, a new f...

A: Which of the following rows correctly identifies the expected levels for the hormones involved in th...

Q: Define matrix

A: Glycoproteins secreted by cells are the core components of the extracellular matrix. (Recall that gl...

Q: Describe a positive-feedback mechanism and givean example.

A: A condition in which the human body is maintained in a more or less steady state by the cells, tissu...

Q: Define ketonuria

A: The urinary system is also known as renal system or urinary tract. The main purpose of the excretory...

Q: Define diploid (2n)

A: Haploid and diploid are terms referring to the number of sets of chromosomes in a cell. Gregor Mende...

Q: Define opposition

A: Body movement is the motion of muscle along with the skeletal system. Various terminologies are prov...

Q: What is the mucociliary escalator?  What would the consequences be to a person if it were damaged?

A: In the human respiratory system, there are two zones called the respiratory zone where actual exchan...

Q: describe the rise in calcium in the sarcoplasm can lead to skeletal muscle contraction

A: The Myofibrils are composed of long myofilaments of actin, myosin, and other associated proteins and...

Q: Define ossification

A: The human skeleton originally includes greatly of cartilage which is fairly soft and is gradually tr...

Q: What are the types of movement in/out of cell membrane?  Which are passive/active?

A: The cell membrane is the membrane that encloses the cell and is made up of important components like...

Q: 9. name the stage of development represented by the three models

A: Fertilization: it can be defined as the union of the nucleus of a sperm cell with the nucleus of an ...

Q: Define lamina propria

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Q: Which of the following rows correctly indicates the hormonal changes that occur during childbirth? ...

A: Childbirth is defined as the period when one or more offspring grows within a woman's uterus also kn...

Q: a. Rodsb. Conesc. Rods and conesd. PhotoreceptorsCells in the eye that are affected by colour blindn...

A: Sensory organs are involved in sensing the different senses. The visual signals are perceived by the...

Q: Define cooperative effect

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Q: The enzymes with which a sperm penetratesan egg are contained in an organelle calledthe ______.

A: The combination of the sperm and an oocyte(egg) causing the fusion of their nuclei is called as fert...

Q: Two muscles have the same diameter, but one is twice as long as the other. Which muscle produces mor...

A: Muscular tissue consists of cells called muscle fibers, which are specialized for contraction. Based...

Q: Define melatonin

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Q: Premature babies born before the 26th week of gestation develop physiological problems because Sele...

A: Fetal development within the womb is called prenatal development. It is a process that occurs in thr...

Q: Define dendritic cell

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Q: Describe the 3 sexual causes of genetic variability and identify the stages of human development wh...

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Q: 38,39,40

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Q: Define abduction

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Q: Define muscle twitch

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Q: The correct pathway of the ovum from oogenesis to implantation is ___, ___ and ___.

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Q: Define pyloric sphincter

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Q: Define iris

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Q: If no antibiotics existed, how might yourlife be different?

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Q: Define parietal cell

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Q: Define microtubule

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Q: Layer A is called _____X________, and ______Y________ develops from this layer. Select one: a. ...

A: Layer A is called ectoderm and nervous system develops from this layer .

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Q: Define pericardial cavity

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Q: Explain how the hypothalamus of the brain controls the endocrine system.

A: The hypothalamus tiny part, placed on the floor of the brain, near the pituitary gland.

Q: Define luteinizing hormone (LH)

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Q: List the function of Serotonin?

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