Answer:
Option B, Beriberi
Explanation:
Thiamin is caused due to the deficiency of vitamin B-1 /thiamine whose chemical name is thiamine pyrophosphate. Thiamin is a water soluble vitamin which occurs naturally and is a very essential nutrient as it plays an important role in energy metabolism and hence regulate the growth, development, and function of cells
Thiamin is stored in liver for a short duration as its life is extremely short and thus it should be ingested regulary.
The deficiency of thiamin causes beriberi and thus food like whole grains, meat, fish breads, cereals etc. must be taken in sufficient amount regularly.
The gene theory declares that all organisms contain coded information in DNA which dictates the form and function of organisms.
<h3>What does the gene theory state?</h3>
Gene theory is one of the major principles of biology that explains the inheritance of traits coded by gene from parents to offspring.
This theory further explains that genes are located on chromosomes and consist of DNA, which stores them.
Therefore, the gene theory declares that all organisms contain coded information in DNA which dictates the form and function of organisms.
Learn more about gene theory at: brainly.com/question/4432306
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Answer:
All of these choices are correct.
Explanation:
Cell cycle is the process of growth and division of cell. It comprises of interphase and mitosis. In interphase the cell grows, replicates its genomic content and prepares itself for division. In mitosis the division occurs.
Cell cycle is controlled by a group of kinases called as Cyclin dependent Kinases (CDKs). They act by phosphorylating their substrates. They are of various types like Cdk1, Cdk2, Cdk4 etc. They become active when they bind to a regulatory protein called cyclin. They are also of various types like Cyclin A, Cyclin B, Cyclin C etc. Level of cyclin and corresponding CDK increases and decreases according to the stage of cell cycle. For example in S phase of cell cycle concentration of cyclin A and E shoots up. CDK2 is able to bind to these cyclin molecules and hence it becomes active.
Cell cycle has major checkpoints where the condition of cell is analysed before it proceeds to the next stage of cycle. If any abnormality is detected, repair mechanism is activated or the cell is killed. Checkpoints do not allow cell cycle to proceed in damaged cells.
p53 is a tumor suppressor protein which can halt cell cycle when it detects some abnormality in cell. It usually acts in G1/S checkpoint (before the DNA replication starts in cell) and G2/M checkpoint (before the cell division begins). Hence, all of the above statements are true.
