Bio with Abdalrahman AlOmari

  مبادرة جامعتي  

 

The copying of DNA is not remarkable in its speed and accuracy

DNA is a polymer of nucleotides

Replication begins at particular sites called.........

................ Is an enzyme that untwist the double helix at the replication fork

The rate of elongation is about 50 nucleotides per second in bacteria and 500 per second in human cells

DATP supplies .......... to DNA and is similar to the ATP of energy metabolism

DNA polymerases add nucleotides only to the free 3′ end of a growing strand

The antiparallel structure of the double helix affects replication

The lagging strand is synthesized as a series of segments called Okazaki fragments, which are joined together by DNA .........

Eukaryotic chromosomal DNA molecules have special nucleotide sequences at their ends called .......

The ........ Leads to the rectum and anus

Bile is made in the liver and stored in the .........

The .......... Connects to the stomach

........... Is the junction that opens to both the esophagus and the trachea

Chief cells secrete inactive pepsin ?

HCl converts pepsin to pepsinogen ?

The ........ Is the longest compartment of the alimentary canal

Risk for heart disease increases with a high LDL to HDL ratio

One of the following is lymphoid progenitor cells

The hormone erythropoietin (EPO) stimulates erythrocyte production when O2 delivery is high

Red blood cells, or erythrocytes, are the most numerous blood cells

Cells and cell fragments occupy about 55% of the volume of blood

€¦â€¦â€¦â€¦â€¦...are organs that filter lymph and play an important role in the body’s defense

€¦â€¦â€¦â€¦â€¦â€¦ that control flow of blood between arterioles and venules

The blood is returned to the heart in conceder of

Nitric oxide (NO) is a major inducer of vasodilation

Vasoconstriction is the relaxation of smooth muscles in the arterioles; it causes blood pressure to fall

The …………… division slows down the pacemaker

The contraction, or pumping, phase is called ………

Diving mammals can store oxygen in their muscles in ………… proteins

€¦â€¦â€¦â€¦.. Are agents that cause diseases

The small, accessible part of an antigen that binds to an antigen receptor is called an ……….

Lung volume increases as the rib muscles and diaphragm contract

Antigen receptors are generated by random rearrangement of

The remaining cells in the clone become long-lived …………. That can give rise to effector cells if the same antigen is encountered again

A pus, a fluid rich in …….

Lymphocytes that mature in the thymus are called……….

Lymphocytes that mature in the bone marrow are called………

Antigen fragments are bound to cell-surface proteins called major histocompatibility complex (MHC) molecules ?

Metaphase is characterized by …………

At which stage of mitosis are chromosomes usually photographed in the preparation of a karyotype?

If there are 40 duplicated chromosomes in a cell, how many centromeres are there?

Which of the following is released by platelets in the vicinity of an injury?

How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbCCDdEE?

Starting with one molecule of glucose, the energy-containing products of glycolysis are _____.