True or false: During cellular respiration, about 60% of the energy from the glucose molecule dissipates as heat.

Maru [420]

A. a piece of DNA that controls a trait

7 0

4 years ago

Feather color in Christmas Parrots is codominant. You have 2 Christmas Parrots each red and green. What are the percentages for

MatroZZZ [7]

Answer: The percentage of each phenotype to be expressed is *50%* each

Explanation: In codominance, two alleles for a particular trait are equally expressed in an individual carrying it, neither an allele is dominant or recessive over the other. In this case the individual shows the two traits of the allels.

Furthermore, when 2 Christmas parrot are crossed with red and green color in an homozygous codominant trait the heterozygous F1 generation will either be red with traces of green or green showing traces of red.

If parrot 1 (Red) is represented as PR PR and parrot 2 (Green) is PG PG the cross between them will give PR PG therefore, the individual shows both traits.

3 0

4 years ago

Growth hormone and insulin are protein hormones that regulate carbohydrate metabolism by hepatocytes (liver cells) through the a

stira [4]

Answer:

Rate of decrease = 3.25 levels/min

Explanation:

the hormone and signaling proteins combination that produce the greatest and most prolonged response as seen in the graph is INSULIN and PROTEIN KINASE. The protein kinase B level gets up to 100 after 30minutes and as well as insulin gets added while the level remained to near 80 even after 240minutes.

The STAT 5 level at the 10th minutes = 100

The level of STAT 5 at 30th minute = 35

From 10 to 30 minutes, the level of STAT 5 = 100 – 35

From 10 to 30 minutes, the level of STAT 5 = 65

Duration = 30 – 10 minutes

Duration = 20 minutes

Rate of decrease = 65/20

Rate of decrease = 3.25 levels/min

6 0

3 years ago

3.32 unit test on cell biology

Mashcka [7]

1.1. Photosynthesis and cell respiration they are chemically opposite

Plants use sunlight as a source of energy. With the energy of the sun, plants use carbon dioxide (CO2) and water (H2O) to make sugars called carbohydrates. This reaction is called photosynthesis.

CO2 + H2O + light energy => O2 + sugar (carbohydrates)

Cellular respiration is a chemical reaction found in animal and plant cells.

Cellular respiration transforms carbohydrates (food) into cellular energy that the cell uses to perform all of its functions.

The reaction is as follows:

6*O2 + glucose => 6*CO2 + 6*H2O.

1.2 they have a relationship to each other

Photosynthesis and cellular respiration are the phenomena that organisms have to obtain energy for their activities. We distinguish two kinds of organisms: heterotrophs and autotrophs.

photosynthesis and cellular respiration is a cycle that depends on each other (the products of one are the reagents of the other).

2.1 Skin cells divide by mitosis.

The somatic cells of our body are divided by mitosis. Somatic cells make up most of the tissues and organs in our bodies - skin, muscles, lungs, intestines, and so on.

Somatic cells are diploid (each has two sets of chromosomes). By mitosis, the genetic material (chromosomes and DNA) of the mother cell is unchanged in each of the daughter cells, which are also diploid.

2.2 The interphase

The interphase is thus the period of the cell cycle during which the nucleus is not dividing, typically intervening between mitotic or meiotic divisions.

Otherwise expressed, interphases are steps in the development of subsequent mitosis or cell meiosis, during which the nucleus is not dividing. In the cells that will undergo further division, the DNA in the nucleus is duplicated for next division during phase S, and the proteins involved in mitosis are synthesized in phase G2.

2.3 Mitosis and cytokinesis

Mitosis is a process involved in the nucleus of eukaryotic cells and immediately preceding cell division, consisting of the equitable distribution of hereditary material (characteristic DNA). This type of division occurs in somatic cells and usually ends with the formation of two distinct nuclei (mitosis), followed by cytoplasmic separation (cytokinesis) to form two daughter cells.

Cytokinesis refers to a division of the cytoplasm that usually follows the division of the nucleus at the end of the mitosis. It is the process by which the cytoplasm of a eukaryotic cell divides into two cells

4 0

3 years ago

Read 2 more answers

Somatic cells of roundworms have four individual chromosomes per cell. How many chromosomes would you expect to find in an ovum

andrezito [222]

Answer:

2 chromosomes

Explanation:

The cell of an eukaryotic organism like roundworm contains the Nucleus, which harbors the genetic material embedded in the chromosome. The number of chromosomes of that organism is contained in each cell.

Somatic cells, also called body cells, are all other cells asides sperm and eggs, that form the tissues and organs of an organism. Somatic cells are usually diploid i.e two sets of chromosomes from each parent. In this question, the roundworm has 4 chromosomes in its somatic cell.

The reproductive cells or sex cells (sperm and eggs) of an organism always result from meiotic division of specialized cells.

Since meiosis is a kind of division that results in cells with their chromosome number reduced by half (haploid), it therefore means that the ovum and sperm cell will be expected to contain 2 chromosomes each.

This way, when fertilization occurs (sperm and egg fusion), the resulting zygote, which will eventually develop into an adult organism, will have 4 chromosomes.

3 0

3 years ago