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Aneli [31]
3 years ago
6

Which of the following statements about functional nuclear domains is correct? Choose all that apply.-There is a single function

al domain where all nuclear activity occurs.-They provide localized regions of function.-They are sites of low activity.-They are highly discrete and organized.-They refer to protein domains encoded by genomic DNA.
Biology
1 answer:
gregori [183]3 years ago
8 0

The correct answers are: They provide localized regions of function and They are highly discrete and organized

Nuclear domains or bodies are membraneless structures within the nucleus that make nucleus compartmentalized. The function of these “compartments” is to enhance the efficiency nuclear processes. Nuclear bodies include:

• the nucleolus-the place where ribosome biogenesis occurs.

•  Cajal bodies- consist of proteins and RNA; its functions are associated with telomerase assembly; in cells that divide rapidly

•  splicing speckles –contain RNA splicing factors

• promyelocytic leukemia protein nuclear bodies-involved in programmed cell death; control cell division.

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When comparing height/weight tables, BMI, and body composition, which is most accurate for determining ideal weight?
kenny6666 [7]

Answer:

Body composition

Explanation:

when comparing  height-weight tables, B M I (body mass index), and body composition the most accurate to determine the ideal weight is through body mass composition.

Body mass composition is  the  ratio of fat mass to fat-free mass and body composition can also be stated as of what body is made up of.

BMI and height/ weight table are not accurate method to determine ideal weight.

when we talk about body builder there weight are more and for them you cannot accurately tell  about the body builder ideal weight.

7 0
3 years ago
How Light Bleaches Rhodopsin
OleMash [197]

Answer:

Salut!

  1. Light enters the eye through the cornea.
  2. Light travels to the macula within the retina.
  3. Rhodopsin absorbs light, and the Vitamin A changes shape.
  4. Vitamin A detaches from the rhodopsin, and some vitamin A is lost.
  5. Vitamin A from the bloodstream replenishes what is lost. The vitamin A returns to its original shape.

Explanation:

Retina is the part of the eye that contains photosensitive cells that capture light and produce the electrical signals that the brain perceives as images. These photosensitive cells are of two kinds:

  • Rods
  • Cones

Rods contain the photosensitive pigment, rhodopsin that is needed for vision at night or in dim light. Cones function in bright light.

Rhodopsin Bleaching:

Vision in bright or excessive light requires a process called rhodopsin bleaching which is the degradation of rhodopsin upon exposure to light. Upon contact with light, rhodopsin goes through structural changes characterized by the conversion of a pigment derived from Vitamin A, 11-<em>cis</em> retinal to all <em>trans</em> retinal. This chemical conversion initiates a photo-transduction reaction (reaction in which a photon of light is converted into electrical signals) that produces the electrical signals that travel to the brain via the optic nerve. The brain converts the electrical signals to images. This is followed by rhodopsin regeneration in the dark in which all <em>trans</em> retinal is converted back into 11 <em>cis</em> retinal.

3 0
3 years ago
During mitosis, the centromere is a region in which Group of answer choices
Butoxors [25]

Answer:

Option 3, Chromatids remain attached to one another until anaphase

Explanation:

Centromere lies at the center, end or other points of the chromosome and joins the two sister chromatids. During cell division, the spindle fibers attaches at the centromere and detaches the chromosomes during the anaphase of the cell division to ensure that each daughter cell gets equal number of chromosomes at the end of mitosis. Centromere plays an essential role in the separation of chromosomes.

Hence, option 3 is correct

4 0
3 years ago
The inheritance pattern for snapdragon flower color exhibits incomplete dominance. a snapdragon that is homozygous for the red a
andriy [413]
The phenotypic outcome will be pink. Incomplete dominance means none of the traits are dominant, therefore they will not mask each other. As a result, they will produce a new trait. In the case of the snapdragons, red + white = pink.
Genotypic wise, all of the offspring will be heterozygous.
7 0
3 years ago
New milestones in environmental policy will most likely deal with long-term issues. true or false
r-ruslan [8.4K]
I believe that the answer is "True" 
5 0
3 years ago
Read 2 more answers
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