Which of the following best describes the effect of cancer-causing mutations on the cell cycle? The mutations increase the speed of the cycle. The mutations cause the cell to bypass checkpoints in the cycle The mutations eliminate one or more stages of the cycle. The mutations interfere with S stage of the cycle. None of these.

Answers

Answer 1

Answer:

Answer:

None of these.

Explanation:

Cancer mutations affect cell cycle regulators.

Cell cycle is a highly regulated process by the regulators that can promote cell cycle or inhibit the cycle. Genes that encode for those regulators are classified into two groups:

proto-oncogenes-encode for positive regulators such as growth factor receptor. If a cancer mutation occurs in the proto-oncogene it becomes oncogene and its product is overactivated. The increased avtivity of positive regulators leads to abnormal cell division.
tumor suppresor-the products of such genes blocks the cell cycle, but after the mutation they become inactive, which leads to uncontrolled cell cycle.

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Adipose tissues belong to ___________a. nervous tissues
b. muscle tissues
c. connective tissues
d. epithelial tissues

Answers

Answer:

c. connective tissues

Explanation:

Adipose tissue is a connective tissue which is composed of cells called adipocytes. Since it a loose connective tissue located beneath the skin and around internal organs.

The main function of this tissue is to store fat, although it also cushions and insulates the body. It provides protective covering around internal organs. Since it stores fat it also functions as a reserve of nutrients.

Adipose tissue also acts as an endocrine organ. It has the ability to make a number of biologically active compounds that regulate metabolic homeostasis.

What is an age-structure diagram, and how can it predict population growth?

Answers

Answer:

Explanation: An age structure diagram is a model that predicts the population growth rate by a shape. It shows a comparative ratio of males to females and the bars show various age groups from infants - adolescents - reproduce - post reproductive.

Which list of words describes an action potential?all or none, neurotransmitters, membrane potential

membrane potential, neurotransmitters, electrical signals

electrical signals, all or none, neurotransmitters

all or none, membrane potential, electrical signals

Answers

All or none, membrane potential, electrical signals is list of words describes an action potential. Option 4 is correct.

An action potential is a rapid change in the electrical potential of a cell membrane. It is a wave of depolarization that travels down the axon of a neuron. Action potentials are "all or none" events. This means that they either occur fully or not at all.

Action potentials are triggered by changes in the membrane potential. The membrane potential is the difference in electrical charge between the inside and outside of the cell membrane. When the membrane potential reaches a certain threshold, an action potential is triggered. This threshold is called the refractory period.

Once an action potential is triggered, it travels down the axon of the neuron. The action potential causes the release of neurotransmitters at the synapse. Neurotransmitters are chemicals that allow neurons to communicate with each other. They bind to receptors on the next neuron, which can trigger another action potential. Option 4 is correct.

To know more about the Neurotransmitters, here

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Order smallest to largest.

organ, cell, tissue, body system

Answers

Answer:

Explanation:

cells, tissues, organ, and body system.

cell, tissue, organ, body system

In asexual reproduction, only one parent contributes to offspring. The offspring aregenetically identical to the parent and with one another. The process involves mitosis but not
meiosis. Describe some of the advantages and disadvantages of sexual reproduction
compared to asexual reproduction.

Answers

Answer:

Explanation:

Genetically Identical to the parent, mitosis,

Advantages: Fast and Efficient

Disadvantages: Lacks diversity

With sexual reproduction, you can have diversity it the offspring
With asexual reproduction, the offspring is an exact replica of the parent

If an enzyme is placed in a lower than optimal pH, its loss of activity might be due to

Answers

Answer:

denaturing of the peptide bonds

Explanation:

Enzymes are proteins that help speed up chemical reactions. However, they require specific temperatures and pH's to work optimally and produce the best outcome.

If an enzyme is placed in a lower than optimal pH, that means that there are more H+ ions, and the environment is more acidic. This influx of H+ ions can denature the peptide bonds within the enzyme, causing it to fold in a different way and be unable to carry out its normal duties. Hence, the activity of the enzyme will decrease significantly.

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