Answer:
D
Explanation:
Facilitated diffusion is a form of passive transport hence no energy is required by the cell. This means that while the molecules are moving down a concentration gradient – line normal diffusion – the movement of the molecules needs to be facilitated (in this case by a transmembrane protein) either because the molecule is polar and can't pass through the hydrophobic region of the cell membrane, or the molecule is too big to passively pass through the small natural pores of the cell membrane.
Answer: b) organelles must interact with each other to synthesize and transport proteins.
Explanation:
The DNA is a genetic material which is converted into mRNA by the process of transcription in the nucleus. The protein synthesis takes place in ribosomes where the translation of mRNA to protein takes place. The proteins are transferred to rough endoplasmic reticulum for the packaging into membrane structures called as cisternae. The proteins are transferred to the golgi apparatus where they are modified, sorted and packed in vesicles. The vesicles take away proteins outside the cell. In golgi apparatus the proteins are tagged with the aminoacids so that they can be targeted to the particular cell.
A Punnett square is a diagrammatical representation in the form of a square that depicts the genotype and the phenotype. The traits written as a letter represent the alleles.
<h3>What are alleles?</h3>
Alleles are the variant of the gene on the chromosome of the genetic material. Allele codes for the specific character of the organism that can be eye colour, hair colour, height, blood group etc.
The alleles on the genes can be recessive or dominant based on their expression in the organism. The dominant allele gets expressed while the recessive gets masked in the presence of the dominant.
The dominant alleles are represented by the capital and the recessive allele by the small letters of the alphabets. The alleles can also be present in purebred or heterozygotic conditions.
Therefore, the traits represent the option A. alleles.
Learn more about alleles here:
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